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SEXUAL ORGANS ANATOMY

Published February 3, 2013 by Tony

 

HUMAN GENITALIA

SEXUAL ORGANS DEEPENING


I’m sure most people, and young especially, are not very familiar with our organs and their functioning. Our body is a masterpiece difficult to conceive, just think of our brain and mind to realize this. But beyond complex or internal organs on which you do not need in-depth knowledge, we all should know a little about sexual organs, our reproductive organs we see and use every day. Not being gynecologists or urologists, there is no need to go into detail, and beyond some scientific detail or strange name, we should understand how these organs work, to be then able to understand their possible dysfunction.
I will examine both male and female sexual organs, simply telling the most important things, and I hope that for you who follow me the reading will be fluent and interesting. As well as I hope that the images, necessary in these cases, do not disturb anyone, convinced that in 2013 no one should feel embarrassed or troubled anymore by such images. [Click on any image to magnify it].
In most “civilized” human societies, genitals are considered a public indecency and sometimes even illegal if left uncovered in public. It ranges from prohibition of exposure of genital areas, buttocks and female breasts. In some Islamic countries the exposure of any part of the female body is even considered indecent. If sexual acts are performed, with or without an element of nudity, this can be considered a public indecency, which may be a more serious criminal offense. Presently, public nudity isn’t permitted in any country and in some states it is only allowed on specific sites that have been assigned by the local authorities. I realize that the post is long because too many things to say, but you can read it a little at a time, if you really are determined to learn more.
As always, I remain at your disposal for any question or friendly comment.

Female Genitals


EXTERNAL PARTS: VULVA

Female Tanner StagesThe term “VULVA” refers to the external part of the VAGINA that has major and minor anatomical structures including:

mons pubis
labia majora
labia minora
clitoris
vulval vestibule
opening of the vagina

Let’s take a look at each of these parts now.

Mons pubis
monsalso known as “mons veneris” or “mound of Venus”, is the adipose tissue lying above the pubic bone (pelvis), the area where during puberty hair start to grow. Its size is depending by genetic factors and body fat. It’s an erogenous zone because from it take form the “larger lips”, the most external organ of the vagina called labia major.

Labia majora
Labium major(nicknamed camel toe), is part of vulva like two long lips that have the purpose to protect the vagina, in fact around them we also find hair. They extend from the mound till perineum, where somevulva_shape centimeters after come the anus. Depending on personal characteristic, the labia major can be more or less open and with different shape, size and color. A 2004 research says that average length ranges within 7.0 – 12.0 cm. A little bit inside from these lips, to either side of the opening of the vagina, develop other two smaller lips, the labia minora.

Labia minora
Labium minoror inner labia, are another protection for the vagina opening. These inner two flaps of skin also change in size and shape from woman to woman and, either can be absent or fleshy/long till to appear outside labia major. A 2004 research says that average length ranges from 2 -10 cm. The inner skin of these labia forms a small cavity called vestibule. In the upper part of the vestibule is the clitoral hood, followed by the femaleLabium minor_big urethral orifice, while almost in middle is the vulval vestibule with the vaginal opening (vagina), the orifice used for sexual penetration (although these holes are very close with one another, the urethral orifice is too small for man to get a wrong target!)   Mons together labia major and minor are the main responsible of the external shape of the pussy.

Clitoris
Clitoris_inner_anatomyis the human female’s most sensitive erogenous zone and the primary source of female sexual pleasure. Clitoris and penis have generally the same anatomical structure, although the opening of the urethra is absent in the clitoris of humans and therefore not used for urination. In fact, during the fetal development the clitoris forms from the same tissues that become the penis in male. The visible button-like portion, called  glans (head),  near the front junction of the inner lips, above the opening of the urethra, is what people generally refers when talking about clitoris. The glans of the clit is roughly the size and shape of a pea, and has more sensory nerve endings than any other part of the female body, and for this it’s the key to female sexuality. A 2004 research says that its length ranges from 0.5 –3.5 cm. Instead, the whole clitoris is a complex structure, containing external and internal components:  glans, the frenulum clitoridis (a frenulum on the under-surface of the glans), the clitoral body or shaft (with the shaft being external and internal), the clitoral hood, two erectile bodies known as theVulva_labeled corpora cavernosa, two clitoral crura and the vestibular or clitoral bulbs. Although the glans is usually small, it can assume different shapes and sizes, with some woman in which it even appears as a small penis (clitoromegaly).
The clitoral body/internal shaft forms a wishbone-shaped structure containing the corpora cavernosa – a pair of sponge-like regions of erectile tissue which contain most of the blood in the clitoris during clitoral erection that usually happens during sexual arousal. The clitoris is rich in its capacity to receive sexual stimulation, which may be explored with a sexual partner or by masturbation. The sexual arousal coming through the clitoral stimulation brings the vaginal duct to lubricate and enlarge itself, predisposing it for a possible penis penetration. The most effective sexual stimulation of this organ is usually through direct stimulation by manual (fingering) or oral stimulation, although these areas may receive indirect physical stimulation during sexual activity (penile penetration), when man’s pubis rubbings and clitoromegaly.pushes also brings the clit to be stimulated someway. Penile-anal penetration may also indirectly stimulate the clitoris, either by the shared sensory nerves (especially the pudendal nerve or by the crura  extending beneath and along the labia minora back to the anus). Anyway, the direct stimulation gives back the highest pleasure, also if due to the glans’s high sensitivity, for a few women the direct stimulation becomes sometimes unfeasible. Usually, fingers that have been lubricated, either by vaginal lubrication or a personal lubricant, is  more pleasurable for the external anatomy of the clitoris. During sexual arousal, the vaginal contractions and the persistent vasocongestion eventually “set off a muscular reflex” which expels the blood that was trapped in surrounding tissues, and lead to an orgasm. And after fingering orgasm, unlike men, the clitoris even becomes more sensitive. The majority of women, 70 percent for general statistics, require direct clitoral stimulation to achieve a faster orgasm. The area near the entrance of the vagina (the lower third) contains nearly 90 percent of the vaginal nerve endings, and there are areas in the anterior vaginal wall and between the top junction of the labia minora and the urethra that are especially sensitive, but intense sexual pleasure and orgasm from vaginal stimulation is occasional because the vagina has significantly fewer nerve endings than the clitoris.

Opening of the vagina
orefice is the last visible part of the vulva, also if to see it often needs to keep open the labia. With it anatomically the vulva ends, and the vagina begins, i.e. the female sexual organs for reproductive purpose. This orifice is below and behind the opening of the urethra and its size varies inversely with that of the hymen. Undoubtedly, this orifice is the narrowest part of the vagina that wider as it goes in deeper through an average diameter that is less than one inch. Size changes when ready for intercourse and according to its size and elasticity, for some girls even inserting a tampon can be difficult, resulting a painful penile-penetration. 

INTERNAL PARTS: VAGINA
The female internal sexual and reproductive organs are:
Vagina
Hymen
Cervix
Uterus
Fallopian tubes
Ovaries

Let’s take a look at each of these parts now.

Vagina
anatomy_Vagina Vagina has insufficient nerve endings for sexual stimulation and orgasm, which is considered to make the process of child birth significantly less
vaginal ductpainful. The outer one-third of the vagina, especially near the opening, contains the majority of the vaginal nerve endings, making it more sensitive  Orgasm also known as sexual climax, is the sudden discharge of accumulated sexual tension during the sexual response cycle, resulting in rhythmic muscular contractions in the pelvic region characterized by an intense sensation of pleasure. Discussions of female orgasm are complicated by orgasms in women typically being divided into two categories: clitoral orgasm  Apart from the difficulty reaching orgasm after ample sexual penetrationstimulation (anorgasmia), significantly more common in women than in men, the amount of time for sexual arousal needed to reach orgasm is more variable and longer in women than in men. Masters and Johnson found that men took about 4 minutes to reach orgasm with orgasmtheir partners. Women took about 10–20 minutes to reach orgasm with their partners, but 4 minutes to reach Finally, the vagina also provides a path for menstrual blood and tissue to leave the body.


Hymen

Is a membranehymen_intactthat surrounds or partially covers the external vaginal opening. In children, at month 5 the vaginal canalization is complete and the fetal hymen is already formed although a common appearance of the hymen is crescent-shaped, many shapes are possible. At this age, the hymen is thick, pale pink, and redundant (folds in on itself and may protrude). By the time a girl reaches school age, the hymen becomes thin, smooth, delicate, and nearly translucent,intact & absent Hymen and can also become very sensitive to touch. Once a girl reaches puberty, the hymen tends to become very elastic. The effects of sexual intercourse and childbirth on the hymen are variable. If the hymen is sufficiently elastic, it may return to nearly its original condition. In other cases, there may be remnants, or it may appear completely absent after a penetration. The hymen may be lacerated by disease, injury, medical examination, masturbation or even physical exercise. For these reasons, it is not possible to definitively deflored_hymendetermine whether or not a girl or woman is a virgin (meaning no penile-penetration) by examining her hymen, given that  an intact hymen is socially highly valued to show virginity. Although  the hymen is usually flexible and can be torn during first engagement in vaginal intercourse, women can possess a thin very fragile hymens or a thick very tough one. In the first case, its laceration can lead no bleeding and without the girl even being aware of it. On the contrary, in some cases the break of the hymen is cause of abundant bleeding that can last long.  In one survey, only 43% of women reported bleeding the first time they had intercourse.

Cervix
cervix or the neck of the uterus, is the lower, narrow portion of the uterus where it joins with the top end of the vagina. It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall like an funnel, representing the end of the vaginal duct. Therefore, any long object or penis inserted, longer than vaginal’s duct, it will inexorably hit the cervix. The cervix has a very small opening to allow sperm or menstrual fluid to move through.

Uterus
uterus-of-human or womb, is a major female responsive reproductive sex organ. It is a pear-shaped muscular organ with the main function to accept a fertilized ovum (egg) which becomes implanted into the endometrium, then becoming later an embryo. In this case, the uterus provides for nourishment from blood vessels which develop exclusively for this purpose. In the absence of fertilization (by a spermatozoa), the egg does not embed
gestationin the wall of the uterus, and a female begins menstruation. If the ovum has been fertilize in the Fallopian tubes, it then becomes an embryo, attaches to a wall of the uterus, creates a placenta, and develops into a fetus (gestates) until childbirth. Due to anatomical barriers such as the pelvis, the uterus is pushed partially into the abdomen due to its expansion during pregnancy.

Fallopian tubes
Fallopian tubes
also known as oviducts, are two very fine tubes leading from the ovaries into the uterus that allows passage of the egg from the ovary to the uterus. On maturity of the ovum, the follicle and the ovary’s wall rupture, allowing the ovum to escape. The egg is caught by the fimbriated (fringelike) end and travels to the ampulla, where typically the sperm are met and fertilization occurs.  This second portion of the uterine tube is puffed-up and sunken to let sperms to be collected.The fertilized ovum, now a zygote, travels towards the uterus aided by activity of tubal cilia and activity of the tubal muscle. After about five days the new embryo enters the uterine cavity and implants about a day later.


Ovaries
ovary are two reproductive organs producing eggs (ovum) through a process called ovulation. For this reason, ovary can be considered analogous to testes in male individuals. The ovary (for a given side) is about the size and shape of an almond and located in the lateral wall of the pelvis which it is connected. Every month during ovulation, either the right or left ovary produces a single mature egg for fertilization. The ovum is one of the largest cells in the human body measuring approximately 0.12 mm in diameter. The few days near ovulation constitute the fertile phase for women. After ovulation, the egg only lives

ovum

for 24 hours or less without fertilization.  If no conception occurs, the uterine lining as well as egg and blood will be shed in menstruation (during menstrual cycle or period). In industrial societies, tampons, menstrual cups and sanitary napkins may be used to absorb or capture these fluids. Menstruation starts (with menarche) at or before sexual maturity (puberty) and ceases at or near menopause (commonly considered the end of a female’s reproductive life when ovary’s follicles stop producing ovum).

Male Genitals

EXTERNAL PARTS:
Male Tanne Stages
pubic region
penis
scrotum


Let’s take a look at each of these parts now.
Pubic region
Pubic Hair similar to female mons pubis, is located on and around the sex organs (crotch) which in male, though has no intrinsic sexual value, is considered an erotic zone, especially if covered with hair. In fact, it’s one of the most hairy male’s body part that start during puberty (pubarche).  Aside from the head, scientists’ common explanation on such a large development of hair (long and sparse) in this area, is to control the temperature which, especially for the testicles, should be less than that of the body.

Penis
is a reproductive organ that additionally serves as the urinal duct. It’s a intricate organ whose external part are:
shaft (body or corpus)
foreskin and shaft skin (epithelium)
glans
corona
urethra  orifice (meatus)


SHAFT
Different shaft/glans shapes The body is a fleshy appendix without internal bone, whose most part is inside the pubic region, and covered with cutaneous skin which from abdomen then differentiates along in foreskin and glans’s skin. It is devoid of hair having no hair follicles.  On the ventral underside of the shaft is visible a line or ridge of tissue that extends from the anus, through thperineal raphe e scrotum and till foreskin which is called perineal raphe.
On entering puberty, the penis, scrotum and  testicles will begin to develop. During the process, pubic hair grows above and around the penis. A large-scale study assessing penis size in thousands of 16–18 year old males found no difference in average penis size between 17 year olds and 19 year olds. From this, it can be concluded that penile growth is typically complete not later than age 17, and possibly earlier.
The variability in size due to arousal level, time of day, temperature, frequency of sexual activity, and reliability of measurement, gives back a childhood difficult measurement of the penis and thus we only can talk about average sizes. Besides, the size of the penis when in “normal” (flaccid, relaxed or non-tumescent) state is still more variable since the penis and scrotum can contract involuntarily in reaction to cold temperatures or nervousness. Anyway, a review of several studies found average flaccid length to be 8–10 cm (3.2–3.9 in) and a diameter of 3.2 cm (1.25 inches). Researchers conclude that flaccid penile puberty in progress length is just under 4 cm (1.6 in) at birth and changes very little until puberty when there is marked growth, apart a limited growth between birth and 5 years of age. It has been suggested that differences in penis size between individuals are caused mostly by genetics, though also environmental factors such as culture, diet, chemical/pollution exposure, can affect the size. The size during puberty internal morphology of the penis is made to produce erections, namely to bring the penis to increase in size and become a straight stiff appendix, for reproductive reasons.
Thus, an erection is the stiffening and rising of the penis, and this occurs during sexual arousal, though it can also happen in non-sexual situations. The primary physiological mechanism that Small Erect Penis brings about erection is the autonomic dilation of arteries supplying blood to the penis, which allows more blood to fill the three spongy erectile tissue chambers in the penis, causing it to lengthen and stiffen. The now-engorged erectile tissue presses against and constricts the veins that carry blood away from the penis. More blood enters than leaves the penis until an equilibrium is reached where an Big Erect Penis equal volume of blood flows into the dilated arteries and out of the constricted veins; so, a constant erectile size is achieved at this equilibrium. While results vary slightly across different studies, the consensus is that the average of fully erect penis ranges within 12,9 – 16 cm (5.1–  6.3 in) in length. Similar results exist regarding studies of the circumference of the adult fully erect penis, with the measurement taken mid-shaft. In three studies of penis size where measurements were taken in a laboratory setting, the range of average penis circumference when erect was 3.5 to 3.9 Process_of_penile_erection inches (8.9 to 9.9 centimetres).
When in erect state, the shaft usually tends to be thicker at the base becoming more thinned until the beginning of the “head”, a formation conical-shaped called the glans penis. Although many erect penises point straightly upwards, it is common and normal for the erect penis to point a little bit nearly vertically upwards or nearly vertically peyronies_disease downwards or even horizontally straight forward, all depending on the tension of the suspensory ligament that holds it in position. Anyhow, a curvature not bigger than 30° still can be considered normal. As the vulva, the erect penis may appear in different shapes, varying in diameter, length, bend, shape of the glans and body, where aside from size, is its body shape and the glans size to affect more.

FOSESKIN
Uncircumcised_and_circumcised_penis The skin covering the penis, very soft and supple, around the glans buy a different structure called foreskin or prepuce. As the most part of the shaft, the foreskin also is devoid of hair. It is a double-layered fold of skin and mucous membrane whose main purpose is to cover and protect the glans and the urinary meatus, when the penis is not erect,  but it is also an element co-operating during intercourse (penile-penetration), whose gliding movements (stretched-wrapped) helps arousal, adding comfort and pleasure of both parties. In fact, A_Foreskin_Retraction_Series foreskin is rich in specialized sensory nerve endings and erogenous tissue. The foreskin is (or should be) retractable over the glans. Like the eyelid, it is free to move after it separates from the glans, usually after birth or before puberty. Smooth muscle fibres keep it close to the glans but make it highly elastic. The foreskin is attached to the glans by a frenulum, which helps return the foreskin over the glans. This frenulum should be the right length to let prepuce go back and forth in an easy way. Many researchers believe that the presence of the foreskin made sexual penetration easier as an erogenous tissue necessary for normal sexual function. Well documented is the complex innervation of Short_foreskin the foreskin and frenulum, as the genitally intact male has thousands of fine touch receptors  (Meissner’s corpuscles) and other highly erogenous nerve endings giving back a sensory mucosa.
The preputial mucosa of the penis is the epithelium of the inside of the prepuce, or foreskin. To differentiate it from the cutaneous skin of the outside of the prepuce, it is sometimes referred to as the inner mucosa. It starts at the ridged band of the prepuce and continues to the coronal sulcus (groove behind the glans penis), where it meets the epithelium of the glans and penile shaft. In circumcised infants, the foreskin Long_foreskin no longer protects the meatal area of the glans; consequently, when wearing diapers, there may be greater risk of developing meatitis, meatal ulceration, and meatal stenosis. Finally, we must also consider that every part of our body, after thousands of years of evolution, has not been put there without a purpose and that it may not be unnecessary or superfluous. Foreskin length can vary from man to man with cases in which it is so short to hardly cover the glans or so abundant to fully cover the glans even during the erection. 

GLANS
well shaped glans is the sensitive bulbous structure at the distal end of the human penis. The glans penis is anatomically homologous to the clitoral glans of the female. The glans is also commonly referred to as the “head” of the penis, while common British slang terms include “helmet,” “knob end,” “popper” and “bell end”, all referring to its distinctive shape. It is generally completely or partially covered by the foreskin, except in men who have been fully circumcised. The circumference of the base of the glans forms a rounded projecting border, the corona glandis, overhanging a deep retro-glandular sulcus (the coronal Small glans due to phimosis sulcus), behind which is the neck of the penis. The proportional size of the glans penis can vary greatly. On some penises it is much wider in circumference than the shaft, giving the penis a mushroom-like appearance, and on others it is narrower and more akin to a probe in shape. The glans is the most sensory structure of the penis, containing a predominance of free nerve endings and numerous genital end bulbs. It has been suggested that the unique and unusual shape of the glans in humans has evolved to serve the function of “scooping” any remnant semen deposited by other rival males out of the deeper part of the vagina of a Corona_of_Glans_Penis female who may have recently copulated, and thereby decreasing the chance of the rival male from impregnating the female. Other theorists suggest that its distinctive shape evolved to heighten the sexual pleasure experienced by the female during vaginal intercourse. In this theory, the glans increases friction and tension at the mouth of the vagina by its additional girth and the dilating properties of its probe-like shape.

MEATUS
meatus At the summit of the glans is the slit-like vertical external urethral orifice.
In males, the expulsion of urine from the body is done through the male penis. The urethra drains the bladder through the prostate gland where it is joined by the ejaculatory duct, and then onward to the penis. At the root of the penis (the proximal end of the corpus spongiosum) lies the pissing external sphincter muscle. Relaxing the urethra sphincter allows the urine in the upper urethra to enter the penis proper and thus empty the urinary bladder. The part of the urethra in the penis has no muscles, and this serves no physiological function beyond that of a duct. Small amounts of urine usually remaining in the distal portion of the urethra, seeping out after the voluntary expulsion of urine is over.

SCROTUM
scrotum the scrotum is a dual-chambered protuberance of skin and muscle, containing the testicles (numerous nerves and blood vessels) and divided by a septum. The scrotum is homologous to the labia majora in females. It looks like a sack hanging behind the penis and between the legs, both sides with two oval balls inside and that becomes covered withScrotal_tightness_and_testicular_elevation pubic hairs at puberty. The function of the scrotum appears to be to keep the temperature of the testes slightly lower than that of the rest of the body. For human beings, the scrotum temperature should be undescended testicles in a boy about 35-36 degrees Celsius (95-96.8 degrees Fahrenheit) , i.e. one to two degrees Celsius below the accepted normal body temperature of 37 degrees Celsius (98.6 degrees Fahrenheit). Higher temperatures may be damaging to sperm count. According to other authors, the testicles are not directly attached to the skin of the scrotum or Hidden_testicles inside, to keep them outside the abdominal cavity where they would be subjected to the regular changes in abdominal pressure. While an alternative big and small scrotum explanation is to protect the testes from jolts and compressions associated with an active lifestyle. During times of lower temperatures, the “Cremaster muscle” contracts and pulls the scrotum closer to the body, while the “Dartos muscle” gives it a wrinkled Testicle_and_epididymis appearance; when the temperature increases, the Cremaster and Dartos muscles relaxes to bring down the scrotum away from the body and remove the wrinkles respectively. The scrotum remains connected with the abdomen or pelvic cavity by the inguinal canal, where at birth (or later before puberty) the testes go cross to reach the sack.

INTERNAL PARTS OF THE PENIS.


male sex organs The human penis is made up of three columns of tissue: two corpora cavernosa lie next to each other on the dorsal side and one corpus spongiosum lies between them on the ventral side, and the urethra.
The corpus cavernosum penis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection. Erectile tissue is tissue in the body with numerous vascular spaces that may become engorged with blood.
Corpus spongiosum is the mass of spongy tissue surrounding the male penis anatomy urethra in a smaller region along the bottom of the penis. The enlarged and bulbous-shaped end of the corpus spongiosum forms the glans penis, which supports the foreskin. The function of the corpus spongiosum in erection is to prevent the urethra from pinching closed, thereby maintaining the urethra as a viable channel for ejaculation. To do this, the corpus spongiosum remains pliable during erection while the corpora cavernosum penis becomes engorged with blood.
Corpus spongiosum The urethra, which is the last part of the urinary tract, traverses the corpus spongiosum, and its opening, known as the meatus, lies on the tip of the glans penis. It is a passage both for urine and for the ejaculation of semen. During ejaculation, sperm are propelled up the vas deferens, two ducts that pass over and behind the bladder. Fluids are added by the seminal vesicles and the vas deferens turns into the ejaculatory ducts, which join the urethra inside the prostate gland, and the semen is penis structure expelled through the penis. The distal section of the urethra (thanks to penis) does however allow a human male to direct the stream of urine by holding the penis. In cultures where more than a minimum of clothing is worn, the penis allows the male to urinate while standing and orientate the flow.

INTERNAL PART OF SCROTUM
Epididymis
Epididymisis part of the male reproductive system and is a single, narrow, tightly-coiled tube (in adult humans, six to seven meters in length) connecting the efferent ducts from the rear of each testicle to its vas deferens. The epididymis is a whitish mass of tightly coiled tubes cupped against the testicles. It acts as a maturation and storage place for sperm before they pass into the vas deferens, tubes that carry sperm to the ampullary gland and prostatic ducts. Spermatozoa formed in the testis enter the head of epididymis, progress to the corpus, and finally reach the lower region (tail), where they are stored. Sperm entering the epididymis are incomplete – they lack the ability to swim forward (motility) and to fertilize an egg. It stores the sperm for 2–3 months. During their transit in the epididymis, sperm undergo maturation processes necessary for them to acquire these functions.
Vas deferens
scrotum anatomyalso known as the sperm duct, is a thin tube approximately 43 centimetres long that starts from the epididymis to the pelvic cavity and transport sperm from the epididymis in anticipation of ejaculation. There are two ducts, connecting the left and right epididymis to the ejaculatory ducts in order to move sperm. Each tube is about 30 centimeters long and is muscular, surrounded by smooth muscle that during ejaculation contracts reflexively propelling the sperm forward. The sperm is transferred from the vas deferens into the urethra, collecting secretions from the male accessory sex glands such as the seminal vesicles, prostate gland and the bulbourethral glands, which form the bulk of semen.
Accessory glands
are the seminal vesicles, prostate gland, and the bulbourethral glands (Cowper glands).
Three accessory glands provide fluids that lubricate the duct system and nourish the sperm cells.
Seminal vesicles
or vesicular glands are a pair of simple tubular glands posteroinferior to the urinary bladder located within the pelvis. Seminal vesicles are sac-like structures attached to the vas deferens at one side of the bladder. They produce a sticky, yellowish fluid that contains fructose. This fluid provides sperm cells energy and aids in their motility. 70% of the semen is its secretion.
Prostate gland
prostateThe function of the prostate is to secrete a slightly alkaline fluid, milky or white in appearance, that usually constitutes 50–75% of the volume of the semen along with spermatozoa and seminal vesicle fluid. The alkalinity of semen helps neutralize the acidity of the vaginal tract, prolonging the lifespan of sperm. The prostate gland surrounds the ejaculatory ducts at the base of the urethra, just below the bladder and is responsible for the production of semen, a liquid mixture of sperm cells, prostate fluid and seminal fluid. This gland is also responsible for making the semen milky in Prostateappearance by mixing calcium to the semen coming from seminal vesicle (semen coming from the seminal vesicle is transparent in color).
Bulbourethral glands
The bulbourethral glands, also called Cowper glands, are two small exocrine glands present located on the sides of the urethra just below the prostate gland. These glands produce a clear, slippery fluid that empties directly the urethra. During sexual arousal each gland produces a clear, salty, viscous secretion known as pre-ejaculate (pre-cum). This fluid helps to lubricate the urethra for spermatozoa to pass through, neutralizing traces of acidic urine in the urethra.
Testiscle or testis
testicles anatomyThe gonad is the organ that makes gametes. The gonads in males are the testes and the gonads in females are the ovaries. The primary functions of the testes are to produce sperm (spermatogenesis) and to produce androgens, primarily testosterone. It is most common for one testicle to hang lower than the other. While the size of the testicle varies, it is estimated that 21.9% of men have their higher testicle on left side, due to differences in the vascular anatomical structure on the right and left sides. The average testicle size after puberty measures up to around 2 inches long, 0.8 inches in breadth, and 1.2 inches in height (5 x 2 x 3 cm). Each testicle contains very fine coiled tubes called seminiferous tubules. The tubules are lined with a layer of cells (germ cells) that from puberty into old age, develop into sperm cells (also known as spermatozoa or male gametes). The developing sperm travel through the seminiferous tubules to the rete testis to the efferent ducts, and then to testis_structurethe epididymis where newly created sperm cells mature (spermatogenesis). The sperm move into the vas deferens, and are eventually expelled through the urethra and out of the urethral orifice through muscular contractions, called ejaculation (cum).
The term sperm (meaning “seed”) refers to the male reproductive cells. A uniflagellar sperm cell that is motile is referred to as a spermatozoon, whereas a non-motile sperm cell is referred to as a spermatium. The initial spermatozoon process takes around 70 days to complete. The spermatid stage is where the sperm develops the familiar tail. The next stage where it becomes fully mature takes around 60 days when it’s called a spermatozoan. Sperm cells are testis carried out of the male body in a fluid known as semen.  Sperm cells consists of a head 5 µm (micrometer) by 3 µm and a tail 50 µm long (1 micrometer is 1×10−6 of a metre, about 0.000039 inches). Human sperm cells can survive within the female reproductive tract for more than 5 days post coitus. Sperm quantity and quality are the main parameters in semen quality, which is a measure of the ability of semen to accomplish fertilization. Thus, in humans, it is a measure of fertility in a man. A semen analysis typically measures the number of sperm per milliliter of ejaculate, and analyzes the morphology (shape) and motility (ability to swim forward) of the sperm (the typical ejaculate of a healthy, physically mature young Ejaculation_educational_seq_4adult male of reproductive age with no fertility-related problems usually contains 300-500 million spermatozoa. The genetic quality of sperm, as well as its volume and motility, all typically decrease with age. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell (zygote), and transmit our genetic characteristics. In mammals, the sex of the offspring is determined by the male sperm cell: a spermatozoon bearing a Y chromosome will lead Complete_diagram_of_a_human_spermatozoato a male (XY) offspring, while one bearing an X chromosome will lead to a female (XX) offspring—the X chromosome. Unlike women, male gonad never stop to produce sperm, though decreasing with age. The force and amount of semen that will be ejected during an ejaculation will vary widely between men and may contain between 0.1 and 10 milliliters, though volume is affected by the time that Pre-ejaculatehas passed since the previous ejaculation.
The first ejaculation in males often occurs about 12 months after the onset of puberty, generally through masturbation or nocturnal emission (wet dreams). The typical ejaculation over the following three months produces less than 1 ml of semen. The semen produced during early puberty is also typically clear. After ejaculation this early semen remains jellylike and, unlike semen from mature males, fails to liquify. [The liquefaction is the process when the gel formed by proteins from the seminal vesicles is broken up and the semen becomes more liquid. It normally takes less than 20 minutes for the sample to change from a thick gel into a liquid. fertilizationA liquefaction time within 60 minutes is regarded as within normal ranges].  Most first ejaculations (90 percent) lack sperm. Of the few early ejaculations that do contain sperm, the majority of sperm (97%) lack motion. The remaining sperm (3%) have abnormal motion. As the male proceeds through puberty, the semen develops mature characteristics with increasing quantities of normal sperm. Semen produced 12 to 14 months after the first ejaculation liquifies after a short period of time. Within 24 months of the first ejaculation, the semen volume and the quantity and characteristics of the sperm match that of adult male semen.
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References: most of the content is from wikipedia.org

SEX EDUCATION

Published January 7, 2012 by Tony

ATTENTION

EXPLICIT SEXUAL CONTENT AND DIALOGUE

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HERE FOR ITALIAN VERSION
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VISIT THIS NEW POST “Q & A” ABOUT SEX

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Answers, opinions and recommendations expressed on this page are personal, therefore, for any doubt or professional consultation you must contact a specialist.


If you don’t find your question or wish to know more, or for any question, write me please and if possible I’ll help you. For more privacy you may write me by email. My address is: antveral@hotmail.it
Have no shame or awe whatever your question is, there is no reason!
Anonymous you’re and anonymous will remain.

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Brainstorm came when some years ago I began to answer some question on “Yahoo!Answers” web-page and realized how many doubts about sex and sexuality boys (but men and women too) have, while some question was so repetitive to become intolerable. Though sex is a topic very diffused, illiteracy and fallacy aren’t unusual. It’s not my intent to rise on a chair as a professor, having – on the other side – neither qualifications nor titles for that, but I only want to put at other’s disposal my knowledge and experience, hoping it can be useful for someone then, giving the input to delve into. Anyway, whoever can e-mail me for more clarification or advices!

COMMON TEENS QUESTIONS ABOUT SEX

(First part)

At what age the male sexual development starts?
When does male puberty begin?

Same question and similar answer: from 12 to 14
At what age the sexual development ends?

Usually at 14 – 16
At what age the growth ends?

Till what age can I grow (height)?
Usually 18 – 20
What is Wet Dream?

Spontaneous and normal nocturnal erections
How avoid nocturnal erections?

By a costant sexual activity

Please consider these ages as indicative. Height and sexual development are connected because they have their spurt during a particular time in human life called PUBERTY. From the birth and till the start of the puberty the development is slow but continuous, becoming faster just during the puberty and lasting 2-4 years long. Then it decreases till to and stop definitively. During this time any child becomes a man physically. For male subjects puberty starts later compared to female and stats say that for male the average ranges among 12 – 14 years. But no worry if it may start a little sooner or later. Anyway, if at 15 years old you note no sign of sexual development yet, it’s the case to talk with a doctor. Most evident signs of puberty in progress are the increase of the tallness (in some case it’s so fast to be called “spurt of growth”), of the sexual organs, the growth of hair on the body (but on pubic area and on lip mainly), and the change of voice tone (by lowest pitch). Usually, not longer than 16-18 years the bones growth slows down, until to stop at 19-20 inexorably! There is no way to know in advance the definitive height. It’s a genetic issue and teenagers can do a rough expectation only looking at their progenitor height, considering that he can’t hope to be 6.23 ft. if his dad, grandfather and great grandparents were not more than 5.57 ft. While the growth is going on also the body shape changes, due to the increasing muscular mass, but the great number of hormones bring some psychological and mental changes too. This particular advanced time of puberty is called ADOLESCENCE when most boys can feel depressed irascible discouraged insecure listless or negligent. For someone it becomes time to evade, break with tradition, protest or becomes introvert. Both parental and social relationships become difficult and unstable. Nothing to worry however, it will subside! Adolescence is time when sexual development is thriving and so erection and sexual excitement increase. Very common are the “wet dreams” and nocturnal erections (or spontaneous erections) due to the high testosterone flowing in the blood during the night mainly. Whether they are a concern for someone, you could come out starting masturbation or having a more constant sexual life. For somebody is useful carrying out masturbation before going to bed. About masturbation, in general more mature and up-and-coming boy starts by himself this new experience while somebody else postpone it until the comparison with friends and further knowledge bringing him to try later.

Can I become taller?
How can I become taller?

Yes if the medical treatment begins during prepuberal age
What is the average (American) height?

Doctors can intervene for helping someone to increase the tallness only if his development isn’t in the end yet and better if during the infancy. Specific hormonal treatments together some sport (swimming, basketball, volleyball, etc.) can be useful for this purpose. Useless asking to get taller at 18 or 20 years old! It’s too late! Somebody – verging on the stupidity – even asks for getting longer arms only! Probably, in the future by genetic engineering & robotic this will be possible. Anyway, some American poll, comparing age and height, says:

10 years 55.67 in.
11 years 58.54 in.
12 years 60.94 in.
13 years 63.03 in.
14 years 66.34 in.
15 years 68.43 in.
16 years 69.02 in.
17 years 69.02 in.
18 years 69.37 in.
19 years 69.49 in.
20 years 62.99 – 70.87 in. (average)

§ Anatomy & Penis size

First, these are the principal external parts of the penis you must know:
Glanspractically is the head of the penis, often the biggest part where the urethra ends by the orifice where pee and sperm come out.

[ http://upload.wikimedia.org/wikipedia/commons/c/cc/Foreskin2.jpg , A PIC ]

Frenulum –is the the strip of skin joining foreskin with the penis. It is alike the thread connecting tongue to the palate.

[ http://upload.wikimedia.org/wikipedia/commons/5/54/Image_of_frenulum.jpg , http://www.miesklinikka.com/mp/db/discussion/x/IMG/31084/attachment/Penisfrenulum.jpg].

What is the average penis (cock) size?

How long a normal penis is or should be?

Nearly 5 – 7
Till what age penis grow?

15-17 more or less
How long my penis will grow?

How long my penis will be?

It’s a genetic issue, no one can know it in advance
What is depending penis size on?

Above I told that during puberty the sexual development starts and at 12-13 years, when most toddlers notice that penis is growing.

[here for penis in pre-pubescence time: http://img.medscape.com/fullsize/migrated/541/801/un541801.fig1.jpg , http://img.springerimages.com/Images/Springer/PUB=Springer-Verlag-Berlin-Heidelberg/JOU=00431/VOL=2007.166/ISU=1/ART=2006_202/MediaObjects/WATER_431_2006_202_Fig3_HTML.jpg , http://www.cirp.org/library/normal/702607.jpg ] [here for puberty start: http://www.biomedcentral.com/1471-2490/6/28/figure/F1 , http://www.mef.hr/Jurak/SliSem/2008/Case4sl01.jpg , http://www.ilcannocchiale.it/mediamanager/sys.user/55497/sexualorgangsBoy2.jpg]

Till sexual development isn’t ended you can’t be sure how long your penis will be. Wait and don’t be worried about size. As many other physic characteristics the penis shape and size are depending on genetic issues. As for the height, expecting to become well-hung whereas our progenitors aren’t, gets no sense. Unluckily, many men get the “locker-room syndromes”! A lot of guys fell ashamed to undress in front of other dudes afraid to have a little penis and to be judged for that. It’s ignorance and bad culture because penis size gets no meaning while most of us just have equal penis length when in flaccid state (flabby or slack).
[sexual development in progress: http://upload.wikimedia.org/wikipedia/commons/6/6f/Le_prepuce.jpg , http://www.nvsh.nl/facts/pictures/sexualorgangsBoy2.jpg , http://uncut.gay-porn-blogs.com/pic-really_long_foreskin.jpg , or in the end: http://www.hospitaladventure.com/wp-content/uploads/2008/10/young-boys-medical-exam-preview1-preview1-preview.jpg , http://www.boypreview.com/data/524/p35556_gay_photo.jpg , http://www.boypreview.com/data/1021/Candid-Twink-567801.jpg ]
About penis size, we can find around many polls carried out on different times and concerning age and race. The following table is a Canadian poll carried out online, so by internet whoever could take part everywhere. More than 3000 persons – affirming to be old from 18 to 55 – were engaged, but there was no way to verify the single entered information. However, the final data more or less is similar to the average coming out from the prior and well-known poll carried out from the Kinsey Institute. The single values put in the columns correspond to the most recurring datum entered by contributors, then giving back to the average.
[men erected penis in the mid-average: http://www.gaydemon.com/blogs/pictures/2006/08/chaosmen-ulrich.jpg , http://www.scallylad.com/wp-content/uploads/2008/06/gay_scally_lad.jpg , http://asian-dick.hornyfatties.com/average-penis-length.jpg , [above average: http://2.bp.blogspot.com/_3EAPTZv3OuM/Sdo9GxY2GGI/AAAAAAAAANY/Bc3Qd8ua4p0/s400/1.bmp , http://www.ilcannocchiale.it/mediamanager/sys.user/55497/big.jpg , http://www.imagespenis.com/enter/subaug2%20(45)_small.jpg]

Erected Penis MINIMUM — MEDIUM — MAXIMUM
Length……………….  5.57 in………….. 6.35 in……….. 7.13 in
Circumference…….  4.67 in………….  5.01 in……….. 5.43 in
Summarizing we can affirm that penis size in the population ranges within
5.57 – 7.13 in.(as average).
I realize if yours is below average you could feel uncomfortable but, know that operationally and physiologically also a penis long 4 in. will do the same things that a longer penis does. Whether it becomes an angst for you then, when possible talk with a surgeon.
[two guys in comparison: http://www.smartbest.eu/dimensione-del-pene-3.jpg , some below average: http://www.the-penis-website.com/banners/6uy3a03prpn6_small.jpg , http://fetishclips.com/showimage.php?cid=166603 , http://twinks.eu/image/ut8_you-want-suck-it-sweet.jpg ]
How long should penis be when flaccid?
What is the average size for flabby penis?
0.8 – 4 in. and 3 as average
Average size of not-erect penis is 3 in. while size can range from 0.8 to 4 in. These are variable values and not-indicative of the erect size, fixed for every body. It means, if the own erect penis size is 6 in. – this size will be kept during erection – independently from the size when penis is slack. Vice versa, erect size isn’t linked with flaccid one, at all! For example, the 6 in. penis could be 4 in. long in the flaccid state or somebody else could have it 2 in. long but – the same –if the fixed erect size is 6, then both the penises will become 6 in. long during the erection. Ok? The only advantage having a longer flaccid penis concerns the (external) appearance. Thanks to the illiteracy, many persons consider lucky the guy and he will feel at ease when naked. Besides, take in account that the flaccid size is continuously depending on some factors like temperature, stress, health, drugs, etc. Cold brings sexual organs (scrotum mainly) to huddle up while hot to sprawl.
[Here for boy penis in the flaccid state: http://www.blogdelpene.com/micropene.jpg , Here about a man: http://fotos.fotosprivadas.com/2007_chicas/MATR23077/imagenes/mipene4.jpg ]
Penis size by race?
What is the average penis size for other populations?
RACE LENGTH
African/black
6.74 in.
Native American 6.49 in.
Middle Eastern 6.28 in.
European/white 6.26 in.
Hispanic 6.03 in.
Asian/Pacific
5.50 in.
Can I have sex by a little (below average) penis?
Can I have children with a small (below average) penis?
What about too short or too long penis?
Is penis size important?
Medically and evolutionary there is no problem because until the penetration and internal ejaculation is possible (fecundation by sexual act) any penis is good and able! On the other hand, he who has short (out average) penis will feel discomfort and psychologically aggrieved, aware that bigger penis could give more satisfaction during the intercourse. It’s told that women have different kinds of stimulations, the clitoral and the vaginal one. A bigger penis gives both of them enough to fulfil widely the woman. I add that aside from the length the circumference should be more important considering vagina conformation, at last. Thus, better a penis thicker than longer! Though, longer & thicker should be the best, of course! Anyway, independent from your penis size you are or will become a man able to have sex and children, so don’t worry.
Manhood or being male isn’t estimate by penis size!

How long should penis be during the development?
How long penis is by age?

Values by age can’t be an actual average for teens because puberty has no exact or fixed time to start and its course isn’t constant or equal for any boy.
However, here’s the most common average penis size by age:

Age ….  range
12…. 3,3 – 4,1 in.
13…. 4,9 – 5,3 in.
14…. 5,4 – 5.7 in.
15…. 5,9 – 6,1 in.
16…. 6,0 – 6,3 in.
17…. 6,1 – 6,5 in.
18…. 6,2 – 6,4 in.
The only consideration I can do here concerns the expectation any boy could foresee considering these value. I mean, whereas sexual development already is in progress, a 14-years- old boy with a penis 5 in. long then shouldn’t expect to get a penis above the average in the end of the development.
[sexual development in progress: http://www.usc.edu/student-affairs/Health_Center/adolhealth/largeimages/template_clip_image008.jpg , fast or precocious one: http://www.boypreview.com/naked_boys_pics/showfull.php?photo=35556 , just in the end: http://1.bp.blogspot.com/_-7dqsX-Ijec/R_DI2avhUlI/AAAAAAAADU0/9ypc3qJfphg/s1600/VOL1308_03_27_08_128.jpg ]
How can I measure my penis?
How is penis measured, commonly?
Since flabby penis size is unimportant, it could be more interesting to measure it when hard. You need a measuring tape (better if with rigid blade) and putting its tip (the zero) on the pubis – where penis starts – then reel off the blade on the trunk until the glans (head). The orifice will show you the limit and the size indicated on the tape. Measuring it underneath is wrong and will give different values depending how much the tape will move the scrotum (balls) back.
[ http://www.penishints.com/assets/images/penis-length.gif , http://www.afraidtoask.com/images/measuretape.gif , http://www.thegrip.com/grip/measure.gif ]
Is the fertility depending on the penis size?
Can I have baby by a short penis?
Fertility has nothing to do with genital size but only with the semen discharged during the ejaculation. Usually, men get a simple “semen analysis” before marrying. Examples of parameters measured in a semen analysis are: sperm count, motility, morphology, volume, fructose level and pH. A low count or mobility can encumber the male fertility but there are some medical treatments for that! Vice versa, sometimes motility and vitality of sperms is so high that drops of sperm put near the vagina even can be risk for an unwanted pregnancy! For scientist, any penis ejaculating inside vagina is appropriate for fecundation!
What is the best penis size?
Do women like big penises?
Aside from the vaginal excitement coming from the penis rubbing inside the vagina duct, during sex the greatest pleasure comes from the clitoral excitement. Take in consideration that clitoris just is at the beginning of the vagina and so any short penises can rub it. “Pleasure” and “satisfaction” are very personal matters, so there is no fixed or exact penis size that can be considered as best. A penis 5.5 in. long can fulfil a woman while another could remain unsatisfied by a penis 7.8 in. long! As audience says, important is being able to “use” it better. I realize you are convinced that “longer” is better, but to certain extend only. Vagina isn’t a pothole endless! Very long penises (more than 8 in.) begin to be a problem and to hit against female cervix and uterus. Again, the average values look natural and more appropriate (from 5 to 7 in.) without leaving out the bigger “girth” that, as mentioned, is preferable. At last, apart any hypocrisy, one of the advantage of long penis is the possibility to carry out any Kama-Sutra positions and give self-determination/confidence to the subject.
Anyway, be yourself independently from your penis length!After this long talk, somebody even couldn’t be satisfied yet and still asking what the best size is! Whether I must specify a size at any cost, in my opinion the best could be – 7.5 x 5,4 in. –
Is there any medicine or device useful to lengthen penis?
Is possible enlarge penis?
As other formidable organs, penis is a very particular one. It is not a muscle and so no exercise can prolong it. If you look at its anatomy, note that inside there is a substance called “corpora cavernosa”, a pair of sponge-like regions of erectile tissue, which, when blood flows into, during excitement, bring penis to become hard. [Look here: http://www.penis–articles.com/wp-content/uploads/2008/04/increase-penis-size.gif , http://www.mhhe.com/socscience/sex/common/ibank/ibank/0045.jpg ]
In some cases, this structure even can be affected by injury. Anyway, there is no way to extend it. Only specific surgery can solve some grave case. Therefore, don’t waste money and time going after false promise as a lot of advertisements announce! They are anonymous sites where unknown people without scruple sell dreams and illusions only! I realize your trouble, but chill out and think….. if any drug or method really was effective, in your opinion, wouldn’t that ‘product’ be publicized widely and well-known in any scientific entourage and around?! Think to the blue pill for instance, in short time Viagra became a famous treatment for a common dysfunction, and well known everywhere! At least, two words about ‘Andropenis’ or similar devices and ‘Jelq’ manual exercise. Well, the first is a mechanical device that put penis in traction and step by step (should) enlarge the corpora cavernosa. Growth (should) occur due to the cellular multiplication of tissues subjected to the continuous force of traction. The same effect could be reached through some manual exercise called Jelq, which with patience and time (could) give some improvement. My opinion here is the same, though Jelq exercises are free while the device needs cash. Without any certain proof I get great doubts and you can’t rely on the attestations or hearsay found by internet! Whereas you think your penis is too small or you feel hung-up…. talk with your doctor (andrologist or urologist is better).

§ Some illness or penis dysfunction

Is my penis too curved?
Can penis bend upwards or downwards?
We aren’t all equal as well as our penises. Normally, penis should be straight and pointing (during erection) a little bit upwards.
[look here: http://www.ilcannocchiale.it/mediamanager/sys.user/55497/big-cock-close-up.jpg , http://upload.wikimedia.org/wikipedia/commons/archive/9/95/20050214184923!Flaccid_and_erect_human_penis.jpg , http://en.wikivisual.com/images/2/2f/Penis_corrected.jpg ]
Anyway, some short bend (as banana or not more than 10-15 degrees) can be possible and independently from the direction (up, down, left or right), there is nothing to be worried.
[Acceptable bending: http://www.andrositalia.org/IMG/penecurvo3.jpg , http://www.penis-website.com/difference/bend1.jpg ]
Severe bend takes difficult masturbation or sexual intercourse and so should be treated. Sometimes a sudden curvature of the penis is a grave illness sign and the guy should get a visit ASAP.
[penises too curved: http://www.andrositalia.org/IMG/penecurvo4.jpg , http://www.andrositalia.org/IMG/pey2.jpg , http://www.peyronies-disease-help.com/peyronies-disease-treatment-pix15.jpg , http://www.peyronies-disease-help.com/picture-of-peyronies-disease26.jpg , http://www.peyronies-disease-help.com/picture-of-peyronies-disease19.jpg , http://www.penecurvo.net/images/p006_1_00.jpg , http://www.penis-website.com/difference/twist29_small.jpg ]
Why doesn’t foreskin uncover the glans completely?
Why can’t prepuce roll around penis?
Phimosis – this just is a very common dysfunction bringing a tight foreskin. Being too tight the prepuce can’t retract or move freely, covering the glans or rolling back as masturbation and sexual act imply. On others cases, foreskin can’t move further because is the Frenulum (the small fold of tissue securing the foreskin) to be too short. A short Frenulum may require a frenectomy or frenuloplasty to achieve normal mobility of the prepuce.Who gets short Frenulum has painful sexual intercourse and frenulum even can lacerate with bleeding (rarely it breaks completely). Phimosis can be slight or severe, but both need to be treated through surgery – either by a simple cut or a complete circumcision to eliminate the foreskin definitively. Such operation is necessary to avoid infection and give a complete functionality to the organ. Generally, these dysfunctions – as others concerning male external sexual organs – should be noticed by parents or doctor during childhood even! On the other hand, it’s opportune to intervene before or during the puberty to avoid bad penis shape and a troubled adolescence.

§ Scrotum & Testicles
What testicles are?
Testicles inside the scrotum produce the sperm, the male semen indispensable to fecundate female ovule – getting woman pregnant – and transfer our genetic code. Sperm (cum) comes out during the ejaculation, when man reach the orgasm, the most pleasant time in the end of the sexual act. Being so important any man has two testicles. [clip about ejaculation: Ejaculation Educational Demonstration.OGG , http://en.wikipedia.org/wiki/File:Ejaculation_Educational_Demonstration.OGG , ] [pictures: http://www.nightcharm.com/imagesblog/2007/10/big_gay_male_cum_shots.jpg , http://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Ejaculation_scatter_pattern.ogv/mid-Ejaculation_scatter_pattern.ogv.jpg , http://nibblebit.com/wp-admin/user_content/7132358bd3c1f11f54591cd04ac1bdf5.jpg , http://www.ilcannocchiale.it/mediamanager/sys.user/55497/wank-01.jpg]
How big should testicles be?
Why one testis is bigger than the other?
Testicular size as a proportion of body weight varies widely. In normal adult human males, testicular size ranges from the lower end of around 14 cm³ to the upper end larger than 35 cm³ (1,18 in. x 0,79 in. nearly). Testicles size can change for some reasons as – short of direct injury or subjecting them to adverse conditions, e.g., – higher temperature than they are normally accustomed to – they can be shrunk by competing against their intrinsic hormonal function through the use of externally administered steroidal hormones. Testicles are contained within an extension of the abdomen called the scrotum (sack) and it is most common for one testis to be greater and hang lower than the other. The percentage of men with a lower hanging right testis or left testis is about equal. This is due to differences in the vascular anatomical structure on the right and left sides, overall but, in particular scientists think it’s a way to avoid “balls” (nuts) to hit each other during the movements.
[testicles during the development: http://upload.wikimedia.org/wikipedia/commons/4/40/Testicular_size.jpg , testicles fully developed: http://upload.wikimedia.org/wikipedia/commons/a/a4/Hanging_testicles.JPG , http://www.mensfaq.com/en/blog/wp-content/uploads/2006/09/_d.jpg ]
Is normal for my testicles to come up in the groin?
Why do I get one testis only in the sack?
Why my testicles move?
Criptorchidism is a medical term referring to absence from the scrotum of one or both testes. This usually represents failure of the testis to move, or “descend,” during fetal development or after birth, through the inguinal canal, into the scrotum. Undescended testis is the most common birth defect of male genitalia. Undescended testes are associated with reduced fertility, increased risk of testicular germ cell tumors and psychological problems when the boy is grown. Undescended testes are also more susceptible to testicular torsion and infarction and inguinal hernias. To reduce these risks, undescended testes are usually brought into the scrotum in infancy by a surgical procedure called orchiopexy. Later in time the operation is carried out and lower will be the possibility to recover the testis functionality. Although Criptorchidism nearly always refers to congenital absence or maldescent, a testis observed in the scrotum in early infancy can occasionally “reascend” (move back up) into the inguinal canal. A testis that can readily move or be moved between the scrotum and canal is referred to as retractile and is caused by inguinal canal not-closed as it should. During the development it’s a risk if testis remain too long in the groin. It’s normal for testicles to move inside the sack arriving till the groin though they don’t have to go out through the inguinal canal and remain in the groin.
[one or both undescended testis: http://draijazsoomro.files.wordpress.com/2009/03/left-undescended-testis.jpg , http://faculty.mdc.edu/jmcnair/undescended%20testis.jpg , http://www.tefvater.org/renal/images/undctest2.jpg , http://www.tefvater.org/renal/images/undctest2.jpg , http://upload.wikimedia.org/wikipedia/commons/0/06/Hidden_testicles.JPG , http://www.meddean.luc.edu/lumen/MedEd/urology/udtexam.jpg ]
Do I have water in the scrotum?
Another common genitalia defect is the Hydrocele testis, an accumulation of clear fluid in one of the most internal membranes containing a testicle. A hydrocele feels like a small fluid filled and transparent balloon inside the scrotum. It is smooth, and is mainly in front of one of the testes. Hydroceles vary greatly in size. Hydroceles are normally painless and harmless, and in children usually, it is present before or after birth and caused by liquid moving from the groin through the inguinal canal while testis descend. Others causes may be a physical trauma, infection or tumor. Sometime the liquid is absorbed slowly in the time but to avoid testes damage it’s opportune intervene before the puberty, at least. The accumulation should generally be removed surgically.
[ http://www.surgical-tutor.org.uk/pictures/images/hne&p/hydrocele.jpg , http://www.koori-childrens-clinic.com/hydro.jpg , http://www.cai.md.chula.ac.th/lesson/atlas/G/ImgBig/IMG0011.jpg , http://www.prohealthsys.com/physical/images/genital-hydrocele4.jpg , http://www.ilcannocchiale.it/mediamanager/sys.user/55497/scrotal_swelling_clip_image002.jpg ]
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ATTENTION – EXPLICIT SEXUAL CONTENT AND DIALOGUE –
(Here for the Original Italian post)
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[Whatever is your question have no shame or awe, there is no reason!]
[Anonymous we’re and anonymous we’ll remain]
SOME QUESTION ABOUT SEX COMMON AMONG TEENS (First part)

Brainstorm came when some years ago I began to answer some question on “Yahoo!Answers” web-page and realized how many doubts about sex and sexuality boys (but men and women too) have, while some question was so repetitive to become intolerable. Though sex is a topic very diffused, illiteracy and fallacy aren’t unusual. It’s not my intent to rise on a chair as a professor, having – on the other side – neither qualifications nor titles for that, but I only want to put at other’s disposal my knowledge and experience, hoping it can be useful for someone then, giving the input to delve into. Anyway, whoever can e-mail me for more clarification or advices!

Development & Height
At what age the sexual development starts?When does puberty begin?
At what age the sexual development ends?
At what age the growth ends?
Till what age can I grow (height)?
What is Wet Dream?
How avoid nocturnal erections?
Please consider those ages as indicative. Height and sexual development are connected because they have their spurt during a particular time in human life called PUBERTY. From the birth and till the start of the puberty the development is slow but continuous, becoming faster just during the puberty and lasting 2-4 years long. Then it decreases till to and stop definitively. During this time any child becomes a man physically.
For male subjects puberty starts later compared to female and polls say that for male the average ranges among 12 – 14 years. But no worry if it may start a little sooner or later. Anyway, if at 15 years old you note no sign of sexual development yet it’s the case to talk with a doctor. Most evident signs of puberty in progress are the increase of the tallness (in some case it’s so fast to be called “spurt of growth”), of the sexual organs, the growth of hair on the body (but on pubic area and on lip mainly), the change of voice tone (by lowest pitch). Usually, not longer than 16-18 years the bones growth slows down until to stop at 19-20 inexorably!
There is no way to know in advance the definitive height. It’s a genetic issue and teenagers can do a rough expectation only looking at their progenitor height considering that he can’t hope to be 6.23 ft. if his dad, grandfather and great grandparents were not more than 5.57 ft. tall!
While the growth goes on also the body shape changes, due to the increasing muscular mass but the great number of hormones bring some psychological and mental changes too. This particular advanced time of puberty is called ADOLESCENCE when most boys can feel depressed irascible discouraged insecure listless or negligent. For someone it becomes time to evade, break with tradition, protest or becomes introvert. Both parental and social relationships become difficult and unstable. Nothing to worry however it will subside!
Adolescence is time when sexual development is thriving and so erection and sexual excitement increase. Very common are the “wet dreams” and nocturnal erections (or spontaneous erections) due to the high testosterone flowing in the blood during the night mainly. Whether they are a concern for you you could come out starting masturbation or having a more constant sexual life. For somebody is useful carrying out masturbation before going to bed. About masturbation, in general more mature and up-and-coming boy starts by himself this new experience while somebody else postpone it until the comparison with friends and further knowledge bringing him to try later.
Is it possible growing more?
Can I become taller?
How can I become taller?
What is the average (American) height?
Doctors can intervene for helping someone to increase the tallness only if his development isn’t in the end yet and better if during the infancy. Specific hormonal treatments together some sport (swimming, basketball, volleyball, etc.) can be useful for this purpose. Useless asking to get taller at 18 or 20 years old! It’s too late!
Somebody – verging on the stupidity – even asked for getting longer arms only! Probably, in the future by genetic engineering & robotic this will be possible. Anyway, some American poll, comparing age and height says:
10 years . .. . . . . . . 55.67 in. 11 years. . . . . . . . . 58.54 in. 12 years . . . . . . . . 60.94 in. 13 years . . . . . . . . 63.03 in. 14 years . . . . . . . . 66.34 in. 15 years . . . . . . . . 68.43 in. 16 years . . . . . . . . 69.02 in. 17 years . . . . . . . . 69.02 in. 18 years.. . . . . . . . 69.37 in. 19 years . . . . . . . . 69.49 in. 20 years……… 62.99 – 70.87 in. (average)
Anatomy & Penis size
First, these are the principal external parts of the penis you must know:
Glans – practically is the head of the penis, often the biggest part where the urethra ends by the orifice where pee and sperm come out.
[click here for some picture: