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.
Stimulation of the G-spot (through the front wall of the vagina) is said to promote a more vigorous and satisfying orgasm, and is possibly the cause of female ejaculation. Such stimulation requires a somewhat opposite thrust to that required to obtain maximal clitoral stimulation via the penis, called "riding high".
The term G-spot is 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).
The supposed analogue for men is the P-spot.