A spot poll would likely reveal that most of us credit that wonder-hormone, testosterone, with some of our dumber moves. (We're still smarting from challenging Russell Crowe to that bitch-slap contest.)

Yet according to a recent study, testosterone may actually help mental functioning. In particular, higher doses of the hormone may help to preserve memory as men get older, and have been associated with higher scores on cognitive tests.

So remember, ladies, when we finish that crossword puzzle in under an hour, it's because we're so chock full o' the he-man juice.