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What are the important parts of the penis?
Your
penis consists of a shaft of erectile tissue covered in smooth skin that's slightly darker than the rest of your body. This erectile tissue is rich in tiny pool-shaped blood vessels that allow the blood
to flood the penis upon arousal. As the penis fills with blood, it stands erect pointing away from the body. Some stick straight out, some straight up and everything in between. All are normal variations.
 Near the end of the penis shaft, the
skin becomes darker or pinker. The foreskin is a retractable double-layered fold of skin and mucous membrane that covers the glans penis and protects the urethra. The
outside of the foreskin is like the skin on the shaft of the penis but the inner foreskin is a mucous membrane like the inside of the eyelid or the mouth. Like the eyelid, the foreskin is free to move.
Smooth muscle fibres keep it close to the glans but make it highly elastic. If the foreskin is intact it rolls over the head or "glans" of the penis. The glans is a spongy
bulbous knob that is extremely sensitive. A noticeable ridge runs around the top and most of the bottom of the head. This ridge is known as the corona. Just before climax, the head becomes swollen
and darkens or reddens in colour. This is a clue, as if you needed it, that you are about to shoot a load of cum (semen).
The penis has a small opening at the tip called the meatus or urethra
where the urethra opens to allow urine and semen out of the body. This is an erogenous zone for many men. Erogenous just means responsive or sensitive to sexual stimulation. When you are aroused
the urethra is blocked from the bladder and the urge to urinate is shut off.
The frenulum, or frenum, is a connecting membrane on the underside of the penis, similar to that
beneath the tongue. This is one of the most sensitive spots on the male body and is one of the most erogenous zones; stimulation of the frenulum results in intense pleasurable feelings during arousal.
Sensations from both the frenulum and the corona during intercourse or masturbation are thought to be the primary trigger of orgasm in the male.
It is believed that stimulation of the glans is most significant in the later stages of sexual intercourse, when penetration is deepest and
emotions are running at their highest. Sensations from the glans contribute to the quality of the sensual experience.
The testicles
are the sperm-producing "balls" that reside in an external sac called the scrotum. This location is important because in order for the sperm to develop properly, they must be kept at a
slightly lower temperature (95 to 97 degrees Fahrenheit, 35 to 36 degrees Celsius) than normal body temperature (98.6 F, 37 C).
When air temperature rises, the balls drop, and get further from the
body to keep their cool. In colder temperatures the scrotum tightens and pulls the balls closer to the body to warm the sperm. At orgasm,
the testicles usually scrunch up even tighter, sometimes seeming to disappear against the penis base.
The testicles are also the main source of the male hormone, testosterone
, and as such are psychologically important to a man's sense of masculinity.
The scrotum is also very sensitive to the touch, especially once you
are aroused. During arousal, the scrotum engorges with blood, scrunches up and pulls the testicles closer into the body. Scrotum skin darkens in color and is sensitive to stroking, cupping with the
hand and gentle caressing and scratching. It is natural for the scrotum to be covered with some pubic hair though usually not as dense as found above and around the penis.
Traveling down lower, the area between the scrotum and the anus is called the perineum. Stroking it gently or touching it lightly with a fingertip can provide very pleasurable feelings.
Going even lower we find the anus, hidden between the male buttocks. The anus is a soft, puckered opening that's a very erogenous zone in its own right. Rub your finger around the area to
feel the sensations but keep this area very clean.
There you have our quick tour of the male sexual and erogenous zones.
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