Another interesting thing is that guys like to show off their injuries. Especially to girls. It's either for sympathy or to show how strong they are, in order to tolerate such a bad injury. Theres then the reasoing that, therefore you should sleep with them cause they're so strong
it doesn't work though,
well maybe not as drastic as that, but i guess that's proabbly the unconscious reasoning behind it.
Also, some guys might get a kick out of grossing people out? eh? i don't know.