Well, women's hearts shrink faster than men's. So perhaps they become cold hearted bitches? http://www.sciencedaily.com/releases/2010/09/100913162323.htm On the other hand mens brains shrink faster. So perhaps they become more of a dumbass. http://www.nytimes.com/1998/02/13/us/men-s-brains-shrink-faster-than-women-s-researchers-say.html