I don't think it's the physical seperation that's the cause, but it's the emotional seperation. It's the ideas that have been implanted...ideas such as "boys dont talk to girls, there should be no communication whatsoever", etc. And it's human nature when u know ur not allowed to do something, u rebel and u do it more. That's regarding the local society. As for foriegner pervs etc I think it has to do with deprivation.