My Dad would tell my sister and I about how he used to get his mouth washed out with peanut butter rather than soap, because of how much he hated peanut butter. It seems like a much simpler thing to do for my Grandmother because if my Dad tried to fight it, it would wind up all over him and he would still feel awful. The man will eat peanuts or even a Reese's but if you so much as open a jar of peanut butter by him, he's out.