I guess boys don’t need as much instruction on how to pleasure themselves, but for girls it’s not that simple. Boys handle their gentials all their life when going to the bathroom, and they are always there, easy to find and manipulate. Girls, on the other hand, don’t touch down there in the normal course of things, we can’t see what we’ve got down there, and there is more than one way of stimulating that region. I know some women who always thought that to have an orgasm, you had to insert something into the vagina. It took an accident in a power-shower or something of the kind to show them where it really hits the spot. They might also expect instant gratification (which it might not be at first) or an ejaculation like with men.
Beside the practical difficulties, female masturbation was never discussed on TV or in books, and it was seen as something only bad girls or nymphos would do. This is getting better, but it’s still taboo for most people.
Perhaps if girls knew the pleasure they could get by themselves, they might compare this to what they get from sex (probably not as good in a youthful, inexperienced, casual relationship), and won’t be as eager to sleep around when they can get more pleasure on their own. In any case, I tell my younger friends who are just starting to explore sex to hold back - DIY is better.
OTOH, I can’t see this flying in American schools, and I can’t see many teachers wanting to teach it, either. Perhaps a leaflet of some sort would be in order, for the kids to giggle over and make jokes about and perhaps actually pick up something useful from too. Or they can just look on the internet - it’s not like they’d come across (npi) any dangerous sites in that search now, is it? [/sarcasm]