Our happy hour fact to amaze your drinking buddies with.

The higher a man's I.Q., the more likely he is to practice sexual exclusivity.

Using a pair of massive general surveys of the American population -- the National Longitudinal Study of Adolescent Health and the General Social Survey -- British researchers were able to ascertain that high I.Q. is positively correlated with monogamy.

According to London School of Economics professor Satoshi Kanazawa, who headed the study, sexual exclusivity is 'evolutionary novel' for men. The evolutionary psychologist speculates that it is easier for intelligent men to overcome their primal urges and honor their sexual vows and commitments. There is no evidence that smarter women are any more faithful.

So the best way for a fellow to ensure he finds a life partner who won't cheat is still, in the immortal words of Jimmy Soul, to "get an ugly girl to marry you."