Our happy hour fact to amaze your drinking buddies with.

Males with a steady tone of voice have a significantly higher number of sex partners than their tonally inconsistent counterparts.

Researchers tested 200 men to observe how much their vocal pitch changed during a simulated dating game, among other situations. The less a man's voice wavered, the more sexual partners that guy reported over the past year.

Experts believe a monotone voice signals to a woman that a man is strong, powerful and in control -- a gent who won't waver in stressful situations. Clint Eastwood and George Clooney are examples of men whose monotone voices contribute to their sex appeal.

And, of course, there's perfectly even-voiced Nixon-speechwriter-turned-actor-and-game-show-host Ben Stein. You'd be a fool to let your woman within a city block of that smooth-talking cat.