I'm assuming because in a cave man sense you 'provide' nothing for the group by being a lazy weak willed virgin. You are defective as a human being because you can't communicate socially, a previously common luxury and something society portrays as natural and easy, often ostricising the awkward in shows like the big bang theory. In the past, being quiet and hateful usually pointed to some form of mental illness and if your use wasn't discovered then you would be kicked out of the tribe and grug would have your cave painting she-wife. <|endoftext|> 