I thought I've done a pretty good job informing my children about the various parts of the body. Even the naughty parts. We call them "the naughty parts."
But I was listening to them the other day playing a video game where they have to shoot paint at a gorilla tied to a wheel that spins (don't ask). After awhile, I heard Emma cackle and announce that she "got him in the vagina."
It seems I haven't done a very good job. But I did shriek with laughter.