Woman on top
Woman on top, also called the cowgirl or riding position, is a group of sex positions in which the man lies on his back or sits, the woman straddles him facing either forward or back, and the man inserts his erect penis into the woman's vagina or anus.
The cowgirl name derives from the image of the receiving partner "riding" the partner as a cowboy rides a bucking horse. It is one of a number of receptive-partner-superior sexual positions, another being the reverse cowgirl position. It is fairly simple to achieve and maintain and pleasures both partners. This position is also used as a precursor to the lateral coital position described by Masters and Johnson.
This position is commonly cited as one of the more popular sex positions, especially by women. In this position, the woman is usually the active partner during the sexual activity.
Cowgirl position