1. Girls are not as openly ridiculed as guys are. Society is tougher on boys therefore men take more crap.
  2. Women find humor attractive and guys know this from an early age so we try harder to develop humor.
  3. Guys don't rank humor at the very top of their attraction list, therefore girls don't care for it.
  4. It is more socially acceptable for guys to say dumb and disgusting comments.
  5. Men care less about their appearance than women: vanity kills humor.
  6. Society has less expectations of men and that makes men more likely to say whats truly on their minds.
  7. Women care too much about hurting other people's feelings.
  8. Guys connect by saying jokes and making fun of each other while girls connect by having meaningful conversations ;)
  9. Guys are emotionally dumber.