TweetThe more testosterone circulating in your body, the less concerned you are likely to be about what other people think or feel. Psychologists at the University of Texas at Austin discovered this when they analysed word-use in emails and the diary of two testosterone users.
Scientists believe there is a relationship between how you think and the amount of testosterone molecules circulating in your blood. High testosterone means above all more aggression, more focus on status and increased interest in sex. In addition, testosterone boosts preparedness for action, spatial awareness and feelings of wellbeing.
and its illeagal to use testosterone why? crazy. good read