The thing is, being too prudish about stuff could rub off and a kid could grow up thinking
sex is dirty. That is not good.
I don't think there is anything wrong with some fifteen year olds watching...say..porky's, or looking at titties. Titties are art, afterall.
Gonna be a hypocrite here and say if i had a daughter, i would be much more strict, and would poke my nose in her affairs a bit more. I know, I know...just being honest.