It is still a social value and needs to be taught by someone other than the gasbag we hire to teach them to read. There is nothing, and I really mean nothing, at all that makes any teacher more expert at teaching about these things or, clearly it is indicated by what they have tried to teach, that gives them the ability to be able to understand what is age appropriate. Believe me. I have read the books they use to teach these folks to become teachers, it simply does not prepare them to teach this stuff at all.
Simply social values need to be taught by the parents. Just as me teaching them about heterosexuality. Heterosexuality "isn't about sex" either....
The reality is: If you would get upset if Pat Robertson was teaching your kid about social mores and where to find them, then folks on the other side have an equal ability to get upset over your values being taught. It isn't whether it is about "sex" or not, it is whether it is even close to something somebody who has a degree in early childhood education (I've read those textbooks, my wife recently got that degree they do NOT prepare teachers for this) to appropriately teach children.
Let them teach them reading, writing, maths, science... save the social mores for the folks at home, that's where folks that have that responsibility reside and can decide on what is age appropriate for their own children.
