Our happy hour fact to amaze your drinking buddies with.

Women can sense if a man is having sexual thoughts by the scent of his perspiration.

Researchers at Rice University had men watch two 20-minute videos -- one of educational material and the other erotic in nature. While they viewed the movies, the subjects wore polyester pads attached to their armpits to capture their sweat. Then the researchers brought in 19 women in their 20s and scanned their brain activity as they sniffed the different sweat-soaked pads.

Although the women weren't necessarily conscious of it, a different area in their brain lit up in response to the "sexual" sweat from what reacted to the "normal" sweat. The Rice team next wants to examine how this phenomenon affects the way men and women behave towards one another.

We can already confirm that women don't respond well to massive pit stains.