It doesn’t matter how educated or civilized you imagine you are – all it takes for you to descend into a Cro Magnon skull crusher is to learn that a man has cursed at your wife. And of course she handled it flawlessly. And of course it’s complicated and somewhat delicate. And of course the last thing that she wants is for you to engage in skull crushing. So you quietly resolve to wait until your wife is asleep, and then sneak out, drive over to his house and crush his skull.