Where did the idea that maybe most of idols have sex in cars come from?
I have to lean more towards Lilium's side for this one. It may perhaps be a bit difficult for some of you guys to imagine what it would be like to live in a conservative Asian society but let me say that there are many many many 20-30 yr old virgins. I'm not saying everyone is but a lot of Asian societies don't believe and don't hold any importance in the western idea that you're a loser if you haven't gotten laid yet by high school. In fact, some, if not most, would push for you to conserve your virginity for marriage.
So yes, there's a bigger possibility that most of kpop idols are still virgins.