Sin
Private (adjective):
... pertaining to or affecting a particular person or a small group of persons; individual; personal;
... confined to or intended only for the persons immediately concerned; confidential;
... removed from or out of public view or knowledge; secret;
... not open or accessible to the general public;
... solitary; secluded;
... intimate; most personal;
What's your point? Maybe next time try looking up the word that you actually quoted?
Sin Why is it offensive to you if a person has knowledge and understanding of their own body?
Offensive? Where did that come from?
I have nothing against a girl's knowledge and understanding of a her own body, but if you're suggesting that letting her look or touch down there on a whim without a reason, just whenever she feels like it, would somehow give her knowledge and understanding, then I have to disagree.