In helmet vs. skull, helmet always wins -- but that doesn't stop college football coaches

Is it smart? No. Does it hurt? Yes. Will it stop happening? Don't count on it. A coach head-butting one of his players in celebration or motivation is nothing new.

source https://www.espn.com/college-football/story/_/id/31668460/the-history-coaches-head-butting-helmeted-players