I know that you're trying to make a point, but you're really just making yourself sound kind of ignorant. Lots of people have casual sex, adults and teens. Lots of teens figure out sex by having it, not by watching porn. Lots of kids watch porn and still need to actually figure out their bodies. I really think that the vanilla view you're taking of sex is an incorrect one, and not at all realistic or accurate to the truth of human sexuality. It's more complicated than that.