The kids in our society, who until people like you started getting the ear of our "public servants" swam naked, so as not to sully there clothes. Kids who knew from a very early age that boys have a penis, and girls have a vagina, often because the had brothers and sisters they observed running round naked constantly??
The only people your ideals could possibly advance, is people who keep strict adherence to sheltering there child, FROM THINGS THEY SHOULD KNOW.
If I were to have a kid, and deny him the ability to learn what math is, should I be upset, when 15 years latter, he has a complete misunderstanding or unhealthy obsession with it?
Historically speaking, Up until VERY recently, some nudity, even in public was completely acceptable.
Infact, I believe I have seen a Norman Rockwell Painting, you would call "child porn"