It appears that men and women may be wired differently so the sex differences we see in every day actions may be more than just testosterone:-http://www.the-scientist.com//?articles.view/articleNo/38539/title/Male-and-Female-Brains-Wired-Differently/-Another version:-http://www.scientificamerican.com/article.cfm?id=how-mens-brains-are-wired-differently-than-women