The receptive partner is either on all fours, or lies on his or her stomach. The penetrative partner approaches and penetrates from the rear.
Doggy-style intercourse
This position maximizes the depth of penetration, which may be desirable by either or both partners, but can pose the risk of pushing against the sigmoid colon. If the receptive partner is male, this position increases the chances of stimulating the prostate. This position makes easier a more vigorous thrusting action. A variation is the leapfrog position, in which the receptive partner angles the torso downward, with the face resting on (for example) a pillow.