When you stare at an attractive, scantily clad woman, you get aroused. Nothing shocking, right?
But the science behind your babe-fueled boner is actually a lot more complex than you think, says Darius Paduch, M.D., Ph.D., director of sexual health and medicine at Weill Cornell Medical College. (To learn all about the science of her arousal, check out How to Pleasure a Woman, the ultimate sex manual from the editors of Men's Health.)
Check out this cool animated video to see exactly what happens to your penis during lust at first sight.
Illustrations by David Biskup, Animation by Luis Campos
