It's somewhat generally accepted that teenage boys are jerks because of high testosterone levels. I just saw a program on TV about sex, and there was a chart showing average testosterone levels as men age. The program pointed out that a man's sexual peak based on testosterone levels is not at 18, it's actually around 35. 18 year olds have about as much testosterone as 60 year old men. If men have the most testosterone in their 30s, why are most men in their 30s more civilized than teenagers? What makes teen boys such jerks?