Do you think Freud may have been on to something with his theories? Perhaps there is an innate desire for women to cause pain to mens' sensitive parts?How many people got their first observation or experience of BB at school? I personally know of several girls who have threatened their bf with castrration, penectomy or general cbt. How often are girls threatened with boob slapping?
It also seems that these threats are widely promoted across popular culture. Is there a deeper psychological explanation for why girls get so much joy from kicking boys in the nuts?