The woman on top position, also called the reverse missionary, jackhammer, or cowgirl, is a type of sex position. In this position,

• the man lies on his back or sits down in a chair of some kind
• the woman sits on top of him facing him, with his body between her legs, and with her groin aligned over his to facilitate penetration.

The name derives from the image of the woman "riding" the man like a cowboy rides a bucking horse. It is one of a number of female superior sexual positions, another being the reverse cowgirl.

Features

Penetration is quite deep, and the woman can control the depth and intensity of penetration. Clitoral pressure may not be very intense for some women, but can be provided by hand, or by the man periodically semi-withdrawing and manipulating his penis against the woman's clitoris, or by other means.
Proponents of the cowgirl position say there are these advantages:

• Very deep penetration.
• Both partners can see one another, and in particular the man can view and caress the woman's breasts while they are in a more natural position.
• Often the man can delay his orgasm longer in this position.
• The position is far less tiring for the man as he does not have to support his weight while also being physically active.
• The woman may take a relatively static position, so that she does not tire (by supporting her upper body with her extended arms with her torso almost horizontal), while the man, not having to support his weight can be quite active without fatigue. This variation eases the strain of motion upon the woman's knees, which may be an advantage for some women.
• The woman can control the depth, intensity and angle of penetration, and enjoy the dominant feeling of being in control.
• The man can enjoy the relaxing and otherwise rare opportunity of reclining and receiving pleasure without physical strain.
• The woman can easily stimulate her clitoris with her hand (if in the upright version).
• The man can stimulate the woman's clitoris with his hand, though some find the thumb to be more comfortable.
• If sitting upright, the woman can reach behind her to stimulate the man's testicles.
• The man can caress the woman's buttocks and stimulate the anus.
• In a variant position in which the woman is on top and leaning over the man, the man and woman can embrace and kiss while the man is penetrating the woman. He can also caress her breasts in the position.