The Gräfenberg spot or G-spot, named after Ernst Gräfenberg, is
a small area in the genital area of women behind the pubic bone and
surrounding the urethra. It is the same as, or part of, the
urethral sponge, the site of Skene's glands.
Stimulation of the G-spot (through the front wall of the vagina) is
said to promote a more vigorous and satisfying orgasm (climax), and
is possibly the cause of female ejaculation; however, it may be
that not every woman has such a spot. See Skene's glands and
urethral sponge for more information. Such stimulation requires a
somewhat opposite thrust to that required to obtain maximal
clitoral stimulation via the penis, called "riding high".
Many sexual advice books encourage couples unable to reach female
orgasm to consider G-spot stimulation as a sexual technique.
It is believed by a growing number of experts that the reason
stimulation of this area causes a "push out" orgasm, even "female
ejaculation", is that it has evolved as a trigger point for
childbirth. The infant's head pushes on this precise spot during
delivery, seeming to trigger the final phase of pushing/delivery.
This translates, during normal sexual stimulation, into a more
significant contraction of the vagina.
The term G-spot also used by analogy as a slang term for the
prostate gland in men, which may be stimulated through anal play or
by pressing on the perineum (skin directly beneath the
scrotum).