So it's "well known" that men are more violent than women due to testosterone - or are they?.

It seems the primary effect of testosterone is to increase muscle development and body hair (among other secondary sex characteristics).

Most conclusions on this matter rely either on conjecture, or unreliable methods of data collection. It should also be noted that men metabolize most of the testosterone produced, and that women have been shown to be far more sensitive to its effects.

Additionally, there was a recent study showing higher testosterone levels increased honesty in men.

Color me intrigued.