(Our happy hour fact to amaze the drunks in the pub.)

Researchers have developed a mathematical formula which explains why it is best for women to withhold sex long into a courtship.

Using game theory principles, a group of professors have mapped out a numerical model which proves a man is always ready sleep with a woman, but only a man interested in a long-term relationship would be willing to partake in an extended courtship that doesn't include sex. Therefore, the longer a women is able to keep her legs crossed, the better chance she has of landing a good man.

This is hardly revolutionary stuff, but now women will be able to counter pleas of "I feel like I know you so well" with an A+B = C retort that was published in a fancy theoretical biology journal. (Should they be giving women this information?)