A 1997 study of villagers in the town of Caerphilly, South Wales found that men having the most orgasms (two a week) were 50 percent less likely to die than those having the fewest (one a month). It's a fun correlation but not really conclusive. "There certainly may be other mediating factors," says Komisaruk. "The men who had fewer than one orgasm per month may [have had] other kinds of health problems." Healthier men are more likely to have sex but sex may still keep us in better health because it is a form of exercise.