Testosterone Equals Aggression or Aggression Equals Testosterone? High levels of testosterone seem to encourage behavior apparently intended to dominate -- to enhance one's status over -- other people. Sometimes dominant behavior is aggressive, it is apparent intent being to inflict harm on another person, but often dominance is expressed nonaggressively. Sometimes dominant behavior takes the form of antisocial behavior, including rebellion against authority and law breaking. One good way to see how it acts on the human body is to perform a test to see if testosterone equals aggression or if it is the other way around. Take a measurement of testosterone several times a day; then monitor the t