The Coital Alignment Technique or CAT is penetrative sex position designed to stimulate the clitoris. It is a modification of missionary position where the woman has her legs together and the man has his apart. The man then uses his legs to move his entire body. When done correctly this position should move the woman's mons Venus (the fatty tissue covering the pubic bones) over the shaft of her erectile tissue, which lies under the skin. In this position, a man will only be able to penetrate about an inch or so inside the vagina but not to worry, Caust says men still get plenty of satisfying sensation. "Even though [men] are more used to being able to thrust inside completely, they're feeling her thighs everywhere," she says. "So he is getting complete stimulation anyway."