In a human male orgasm, there are rapid, rhythmic contractions
of the prostate, urethra and the muscles at the base
of the penis, which (in the adult) typically forces
stored semen to be expelled through the penis' urethral
opening, in a process known as peristalsis. This is
referred to as ejaculation. The process generally takes
from 3 to 10 seconds and is usually extremely pleasurable.
Orgasm is generally induced by direct
stimulation of the penis. Some men experience heightened
orgasm by direct stimulation of the prostate through
the perineum or rectum.
As a man ages, it is normal for the
amount of ejaculate to diminish, and hence, the length
of time the man sustains orgasm also diminishes somewhat.
This does not affect the pleasurable feeling of orgasm
at all, it merely shortens the duration of it.
Following ejaculation, a refractory
period usually occurs during which a man cannot have
another orgasm. This period can be anywhere from less
than a minute to over half a day, depending on age and
other individual factors. A few cases have been reported
of men who appear to have no refractory period at all.
Scientists theorize that a pituitary gland difference
may cause this unique ability. |
