Closed Fist Punching

The shape of the human hand allows for th formation of a tight fist. The thumb is curled under to protect the fingers and tuck them into the palm. And this allows the fist to serve as a club, which can deliver heavy blows with reduced risk of injury to the hand. Ahal says he has doubts that punching behaviours were a main part of what the hand evolved for. He also questions whether beards are supposed to make you more sexually attractive.