Look, I think that sex education is very important, and youngsters must be educated about it, since I saw a quite amount of young people at age of 20 and on who don't even know the basic stuff about their biology and this quite alarming but I understand your concerns as well, and to be honest I don't think that kids at early age must be thrown into adult world like this (referring to you, saying about 9-11 age group) And for sure sex educational system has to be worked on and on, because I think it must come in some kind of stages, like it starts with a "lite" stuff and then when kids grow up they gain more information but for sure not all at a time. As well, it need to be mentioned that it's not supposed to come only from school but also from home, so maybe there must be some kind of short courses to parents about how to deliver this info to their kids.
Yes. Parents should be the first sex education teachers for their children. When your children know the right thing from the house, it helps in their decisions. I agree with you