What do kids know about safer sex, and how do they use that knowlege?

At this point, I've only got personal and anecdotal evidence from my short stints doing safer sex ed at the DiFrank Center in San Jose, and from teachers. I'm looking for reputable statistics on what kids know about safer sex and how they use that knowledge. I'm also looking for statistics on myths and mis perceptions kids and adults have about safer sex. This includes concepts like the "virgin cure" that's popular in talk about AIDS in Africa and Asia. I have no idea if the "virgin cure" myth is it's self a myth, though..

Some quick statistics: One in five ninth graders in this CA study has had oral sex. Why? They think it's less risky than vaginal sex, and that it does not 'count' in terms of virginity.

America has one of the highest teen pregnancy rates worldwide

Sweden has one of the lowest rates worldwide

Effective, safe, free and anonymous emergency contraception is available in most areas of Europe. In America, it's been held up for ideological reasons

I think we know what works. I think kids in America know about the existence of condoms just as well as kids in Europe do. So what's the difference? Why are European teens, who as far as I can tell, have sex just as much as American teens, getting pregnant or infected with STDs at such a dramatically lower rate?