Snails and dog tails make you more aggressive.
When we grow up, women are more likely to be penalized for displaying too much aggression, while men are rewarded for the exact same behavior.
Sometimes with millions of dollars.
When actually ...
Women might be the more aggressive of the genders.
Researchers found that when you deindividuate a person--or place the person in a situation where he or she doesn't have an individual identity--aggressive attitudes are amplified. This makes sense. It's probably why Marines are required to wear the same uniform, and hipsters are such pussies. Well, they tested this in the lab by having men and women play an interactive video game that required killing other players by dropping bombs on them.
They found that under normal circumstances, men dropped far more bombs than women. But in the deindividuated groups, women out-attacked the men every time, with an average of about five more bombs dropped per session.