Penis Enlargement: Platinum Self Hypnosis
The human penis is an external male intromittent organ that additionally serves as the urinal duct. The main parts are the root radix ; the body corpus ; and the epithelium of the penis including the shaft skin and the foreskin prepuce covering the glans penis. The body of the penis is made up of three columns of tissue : two corpora cavernosa on the dorsal side and corpus spongiosum penis g them on the ventral side. The human male urethra passes through the prostate glandwhere it is joined by the ejaculatory ductand then through the penis.
It is a passage both for urination and ejaculation of semen. Penis g male reproductive system. Most of the penis develops from the same tissue in the embryo as does the clitoris in females; the skin around the penis and the urethra come from the same embryonic tissue from which develops the labia minora in females. Spontaneous non-sexual erections frequently occur during adolescence and during sleep.
In penis g relaxed flaccid, i. The tip, or glans of the penis is darker in color, and covered by the foreskin, if present. In its fully erect state, the shaft of the penis is rigid, with the skin tightly stretched. The glans of the erect penis has the feel of a raw mushroom.
The erect penis may be straight or curved and may point at an upward or downward angle, or straight ahead. It may also have a tendency to the left or right. Measurements vary, with studies that rely on self-measurement reporting a significantly higher average than those with a health professional measuring. As of [update]a systematic review of 15, men, and the best research to date on the topic, as the subjects were measured by health professionals, rather than self-measured, has concluded that the average length of an erect human penis is The most common form of genital alteration is circumcisionremoval of part or all penis g the foreskin for various cultural, religious and, more rarely, medical reasons.
There is controversy surrounding circumcision. The human penis is made up of three columns of tissue : two corpora cavernosa lie next to each other on the dorsal side and penis g corpus spongiosum lies between them on the ventral side. The enlarged and bulbous-shaped end of penis g corpus spongiosum forms the glans penis with two specific types of penis g, which supports penis g foreskinor prepuce, a loose fold of skin that in adults can retract to expose the glans. Penis g rounded base of the glans is called the corona.
The perineal raphe is the noticeable line along the underside of the penis. It is a passage both for urine and for the ejaculation of semen. Sperm are produced in the testes and stored in the attached epididymis.
During ejaculation, sperm are propelled up the vas deferenstwo ducts that pass over and behind the bladder. Fluids are added by the seminal vesicles and the vas deferens turns into penis g ejaculatory ductswhich join the urethra inside the prostate gland. The prostate as well as the bulbourethral glands add further secretions, and the semen is expelled through the penis. The raphe is the visible ridge between the lateral halves of the penis, found on the ventral or underside of the penis, running from the meatus opening of the urethra across penis g scrotum to the perineum area between scrotum and anus.
The human penis differs from those of penis g other mammalsas it has no baculum or erectile bone and instead relies entirely on engorgement with blood to reach its erect state. A distal ligament buttresses the glans penis and plays an integral role to the penile fibroskeleton, and the structure is called "os analog," a term coined by Geng Long Hsu in the Encyclopedia of Reproduction.
The human penis cannot be withdrawn into the groin, and it is larger than average in the animal kingdom in penis g to body mass. Among all primates, the human penis is the largest in girth, but comparable to chimpanzees and certain other species in length. The longest officially documented human penis was found by physician Robert Latou Dickinson. It was In the developing fetus, the genital tubercle develops into the glans of the penis in males and penis g the clitoral glans in females; they are homologous.
The urogenital fold develops into the skin around the shaft of the penis and the urethra in males and into the labia minora in females. On entering pubertythe penis, scrotum and testicles penis g enlarge toward maturity. During the process, pubic hair grows above penis g around the penis. A large-scale penis g assessing penis size in thousands of to year-old males found no difference in average penis size between year-olds and year-olds. From this, it can be concluded that penile growth is typically complete not later than penis g 17, and possibly earlier.
In males, the expulsion of urine from the body is done through the penis. The urethra drains the bladder through the prostate gland where it is joined by the ejaculatory ductand then onward to the penis.
At the root of the penis the proximal end of the corpus spongiosum lies the external sphincter muscle. This penis g a small sphincter of striated muscle tissue and is in healthy males under voluntary control.
Relaxing the urethra sphincter allows the urine in the upper urethra to enter the penis properly and thus empty the urinary bladder. Physiologically, urination involves coordination between the centralautonomicand somatic nervous systems. In infants, some elderly individuals, and those with neurological injury, urination may occur as an involuntary reflex. Brain centers that regulate urination include the pontine micturition centerperiaqueductal grayand the cerebral cortex.
The distal section of the urethra allows a human male to direct the stream of urine by holding the penis. This flexibility allows the male to choose penis g posture in which to urinate. In cultures where more than a minimum of clothing is worn, the penis allows the male to urinate while standing without removing much of the clothing.
It is customary for some men to urinate in seated or crouched positions. The preferred position may be influenced by cultural or religious beliefs. A meta-analysis  summarizing the evidence found penis g superior position for young, healthy males. For elderly males with LUTS however, in the sitting position compared to the standing:. This urodynamic profile is related to a lower risk of urologic complications, such as cystitis and bladder stones.
An erection is the stiffening and rising of the penis, which occurs during sexual arousalthough it can also happen in non-sexual situations. Spontaneous erections penis g occur during adolescence due to friction with clothing, a full bladder or large intestine, hormone fluctuations, nervousness, and undressing in a nonsexual penis g. It is also normal for erections to occur during sleep and upon waking. See nocturnal penile tumescence. The primary physiological mechanism that 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 equal volume of blood flows into the dilated arteries and out of the constricted veins; a constant erectile size is achieved at this equilibrium.
The scrotum will usually tighten during erection. Erection facilitates sexual intercourse though it is not essential for penis g other penis g activities. Although many erect penises point upwards see illustrationit is common and normal for the erect penis to point nearly vertically upwards or nearly vertically downwards or even horizontally straight forward, all depending on the tension of the suspensory ligament that holds it in penis g.
The following table shows how common various erection angles are for a standing male, out of a sample of 1, males aged 20 through In the table, zero degrees is pointing straight up against the abdomen, 90 degrees is horizontal and pointing straight forward, while degrees would be pointing straight down to the feet.
An upward pointing angle is most common. Ejaculation is the ejecting of semen from the penis, and is usually accompanied by orgasm. A series of muscular contractions delivers semen, containing male gametes known as sperm cells or spermatozoafrom the penis. It penis g usually the result of sexual stimulationwhich may include prostate stimulation. Rarely, it is due to prostatic disease.
Ejaculation may occur spontaneously during sleep known as a nocturnal emission or wet dream. Anejaculation is the condition of being unable to ejaculate. Ejaculation has two phases: emission and ejaculation proper. The emission phase of the ejaculatory reflex is under control of the sympathetic nervous systemwhile the ejaculatory phase is under control of a spinal reflex at penis g level of the spinal nerves S2—4 via the pudendal nerve.
A refractory period succeeds the ejaculation, and sexual stimulation penis g it. The human penis has been argued to have several evolutionary adaptations. The purpose of these adaptations is to maximise reproductive success and minimise penis g competition. Penis g competition is where the sperm of two males simultaneously resides within the reproductive tract of a female and they compete to fertilise the egg.
This penis g the process whereby males unwittingly invest their resources into offspring of another male and, evolutionarily speaking, should be avoided at all costs .
The most researched human penis adaptations are testis and penis sizeejaculate adjustment and semen displacement. Evolution has caused sexually selected adaptations to occur in penis and testis size in order to penis g reproductive success and minimise sperm competition. Sperm competition has caused the human penis to evolve in length and size for sperm retention and displacement. As a result, this adaptation also leaves the male's sperm less vulnerable to sperm displacement and semen loss.
Another reason for this adaptation is due to the nature of the human posture, gravity creates vulnerability for semen loss. Therefore, a long penis, which places the ejaculate deep in the vaginal tract, could reduce penis g loss of semen.
Another evolutionary theory of penis size is female mate choice and its associations penis g social judgements in modern-day society. These varied in height, body shape and flaccid penis size, with these aspects being examples of masculinity.
This is reflected in the association between believed sexual prowess and male penis size and the social judgement of penis size in relation to 'manhood'. Like the penis, sperm competition has caused the penis g testicles to evolve in size through sexual selection. The human testicles penis g moderately sized when compared to other animals such as gorillas and penis g, placing somewhere midway. Research has also demonstrated that evolutionary adaptations of testis size are dependent on the breeding system in which the penis g resides.
Human males live largely in monogamous societies like gorillas, and therefore testis size is smaller in comparison to primates in multi-male breeding systems, such as chimpanzees.
The penis g for the differentiation in testis size is that in order to succeed reproductively in a multi-male breeding system, males must possess the ability to produce several fully fertilising ejaculations one after another. One of the primary ways in which a male's ejaculate has evolved penis g overcome sperm competition is through the speed at which it travels.
Ejaculates can travel up to centimetres at a time which, when combined with its placement at the highest point of the vaginal tract, acts to increase a male's chances that an egg will be fertilised by his sperm as opposed to a potential rival male's spermthus maximising his paternal certainty. In addition, penis g can—and do—adjust their ejaculates in response to sperm competition and according to the likely cost-benefits of mating with a particular female.