Penis Anatomy

Penis Anatomy

Anatomy: Meet Your Penis
Your Penis
Given the amount of attention to this important body part, it is strange that there is so much myth, mystery and misinformation about the penis. First off, there are no bones or muscles in the penis. In fact, the penis is made up primarily of spongy tissue, which becomes engorged with blood during erection. Two or three inches of the penis are rooted inside the body in the pubococcygeus muscle (PC muscle) and it is possible to strengthen this muscle for stronger erections, stronger orgasms and better ejaculatory control.

Your Testicles
Because normal body temperature is too hot for sperm production, your testicles hang down, away from the body. As you prepare to ejaculate, the testicles are pulled toward the body. Sperm move through the vas deferens, a firm tube that extends from your testicles to the prostate gland, where they mix with secretions to form your ejaculate. The sperm are actually only a small part of the ejaculate.

Your Prostate
The prostate is a gland that lies at the center of your pelvis and is highly sensitive to sexual stimulation. Some authors have even called it the male G-spot. During erotic stimulation, the prostate becomes increasingly aroused. The closer you are to orgasm, the more sensitive the prostate is. About 1/3 of your ejaculate comes from the prostate, so keeping your prostate healthy is very important (though examinations can be unpleasant). The prostate can be stimulated externally or through the anus.

Your Perineum
The perineum is the area between the base of the testicles and the anus. This area can be very sensitive to sexual stimulation, especially during orgasm.

Your Pubococcygeus (PC) Muscle
The PC muscle is actually a group of muscles that run from your pubic bone in front to your tailbone in the back. You use the PC muscle every time you stop the flow of urine from your bladder. It is also the muscle that contracts when you ejaculate, moving the semen up through the penis and out of the body.

Your Anus
Due partly to it's proximity to the prostate gland and partly to its own high concentration of sensitive nerve endings, the anus is a highly erogenous zone for many men (both gay and straight). Extra care must be taken while sexually exploring this area, as it is rich with bacteria.