This is a very sexual society. People are led to believe it's just a function and it's OK to do it with anybody and there's something wrong with you if you don't. There are a lot of girls having sex and not even enjoying it, don't know they are supossed to. They are doing it trying to be cool and get attention.
You only have one virginity and I can't imagine giving it up to just anybody, let alone some horny teenaged boy, who chances are does not even respect or appreciate what he has been given or some nasty butt man who is only seeing a piece of fresh tail.