-hahahahahahahahahaha
very funny
by the way, I don't know what's the fuss about if kids find out on their own. I think it's all educational and it's a learning process.
I learned it very late and I would not want my kids to be deprived of "life" knowledge.
"Kama Sutra" also comes under "life" knowledge, start teaching them that as well.
They don't need to have certain type of knowledge before certain type of age otherwise their innocence would be killed and they won't remain children. You'll have sexualy active children and this is what it talks about in "Brave New World".