Women are screwing up human evolution by going out with the "Bad Boy".
I heard a really insightful analysis about why great women go out with bad guys on CBC yesterday, by a woman psychologist and writer. She said that it's because girls see all these roles layed out before them when they're growing to be a woman, these stereotyped societal roles, and just say "No!". They also see the good guy as boring, and the bad boy as exciting. I found this analysis very illuminating.