Quick, when was the last time your kid saw some other kid's privates? A kid of the opposite gender, I mean? When I was growing up, this was sort of a given. I'm the oldest of five children, so I saw all my sibs' diapers getting changed. And I saw my friends' mothers changing their babies' diapers. And I saw diapers getting changed at church. From an early age, I learned that little boys look different -- and it wasn't a big deal at all.
So it's just been weird to grow up and discover some people think children should be shielded from the horrifying knowledge that there are babies out there with DIFFERENT GENITALS! I mean, from there it's just a slippery slope of childhood corruption. Sayonara to your little darlings' shattered innocence. Now she knows there's such a thing as a penis -- OH MY GOD, you didn't tell her that's what it's called, did you?!?