Proof God, should he exist, is a male.

  1. Pregnancy means you cannot have any alcohol, yet you still wake up with a hangover.
  2. "God is a man. No, wait, follow me on this -- follow me on this. I figure any deity that has five and a half billion kids who haven't seen or heard from him in 2,000 years -- that's gotta be a man." - comedian Sean Murphy
  3. The head is 10 times bigger than the hole it has to come out.

Adapted from a deleted RationalWiki article