The problem with sex on the first date is the fragile male ego.
He can't stop wondering who ELSE she has had sex with. The number is so arbitrary as to when its 'ok' to have sex its pretty well meaningless and stupid, but we hold onto it. Men want to think they are special, they have been selected under harsh judgement, that they are worthy, and by not knowning the guy that well prior the man no longer feels special.
Its not about the hunt for the woman, its about the woman not showing she is selective.
As usual I'd love to get into the behavior side of this, but its prob a bit more than is needed
