I have been blasted in the head and face over a dozen times in fights. Eaten three or four sucker punches, too.
Shit isn’t good for the ol’ cranium computer.
If you actually KNOW what happens to all that grey matter, circuitry and structure when you receive a blow, you would never choose to allow someone to pummel your lid, with fist, heel of hand or otherwise.
This slap sport is entirely idiotic.