>>I’ve diagnosed in the 15-20 age group. <<
You have the opinion that every girl over puberty is sexually active. I know many who are not. How do I know? Friends on MySpace, personal experience and trust that they tell the truth.
You may see tons of sexually active girls. Why would you see tons that aren’t?
I was a virgin until 34. It is not unreasonable.
But it is highly unusual. We need to deal with the fact that most young people are sexually active and treat them accordingly.