Do you have an undeniable attraction to bad boys? Tattoos, excessive brooding, a motorcycle and a leather jacket ... these are the perfect aphrodisiacs for almost any woman. But, seriously, why do so many women go weak in the knees for a sexy bad boy? The answer is more scientific than you probably think.

According to newly published research, women swoon over bad boys because their hormones make them. An ovulating woman's hormones influence her to choose sexier men over more obviously dependable men.