I have always wondered about this. I have 4 boys, and 1 likes anime. I don't allow them to see what I am watching as I like a whole variety of anime. Much of it is inappropriate for children their age. I do however allow them to watch ones I have seen or watched as a child. (I.E. Dragonball series, Ruroni Kenshin ect.)
I don't mind them learning that sneaking a peek at a woman is not right, but I don't want to expose them to a anime that shows breasts and panty shots 24/7.
This is my opinion on it, I would love to hear yours!