Beautiful Wife: "Why is it that the guys who insist that 'My girlfriend doesn't wear much makeup' are always going out with girls who clearly slather the stuff on with a trowel?"
Me: "Because any guy who would say that clearly knows next to nothing about makeup and how people use it. The statement doesn't actually have anything to do with their girlfriends; it's a sociological marker indicating their complete ignorance on the subject of makeup."
Beautiful Wife: "And they're dating these makeup abusers because they themselves don't know enough about makeup to know any better?"
Me: "Exactly. It's a variation on the classic 'too incompetent to realize they aren't competent' problem."
Beautiful Wife: "Should I be worried that you've actually thought about this?"