I was in 4th grade the first time I remember a girl in my class getting breasts. And I don't think it's a bad thing to at least know the basics a year or two before it's going to start. Like, I don't know a single woman around my age (34) that learned about that in a "good" way. It was all either on accident or the internet or if they were lucky an older/more experienced friend. It's not really a thing that got talked about the way it's talked about for boys. Then you wonder how women get to be in their 20's without knowing that sex is a thing they're supposed to actually enjoy, too.

Not saying I would've wanted to hear about this from a grandparent necessarily, but I'm not sure why this is so scandalous to people.