You gave yourself a powerful mind altering chemical that most peoples bodies/minds have grown up with and have built up mental models, skill, techniques to handle it. Your mind however did not have a half a life time to learn how to handle it. That is why:

it probably isn’t very helpful in a technological civilization which requires people to sit at computers all day manipulating symbols. My guess is that women are going to rule in such a world, as high testosterone men become increasingly useless and tend to wind up in prison. It may get to the point where testosterone levels will need to be technologically lowered to reduce crime and make men more socially acceptable.

So understand this, all you LessWrong nerds: when you see someone who is like a thug to you, realize that he is in the grip of an incredibly powerful mind-altering chemical called testosterone which, more than any other, is responsible for the evil that men do.

seem to be based on thin evidence.