But everyone knows that most people (especially guys) lie completely about their virginity. Even when I was 12 or 13, there were loads idiots claiming they had experience. Maybe one of them did, but most were just lying.
When you're 16 or 17, you think that everyone's done it but very few realise that most people (well about half) haven't.
Even at uni, you'd be surprised about the number of people who are still virgins. It's not just a couple of tenths of a percent. Quite a lot are. For people for whom sex is something with a bit of importance, finding the right person to be intimate with is tricky. That's why you get a lot of people even at 23 or 24 who are still virgins.