Research has found that not only do women fall in and out of sexual attraction over the course of their menstrual cycle, but when they're most fertile their sexual attraction for manly men goes into overdrive. It’s at that point that men with deep voices and furry faces really score when it comes to ladies. But then it passes, because as a 2010 study found, women only want those manly men while they're fertile and not for the long term. Basically, women want to have make babies with Thor, but marry the soft, sensitive, poet type.