heres a link thats kind of related. it's a podcast by this american life called testosterone. it chronicles the behavior of a man who stopped producing it and a woman undergoing a sex change who received too much. it's interesting to note the change in behavior and attitude caused by the alteration of this hormone. sometimes we think that we are the drivers in our life and it may turn out that ones attitudes and behavior are far more driven by "animal instinct" (biological processes).
Testosterone | This American Life