Well, Social norms are established by Local Culture as a whole are rather easily observed-but thats not what I want to talk about

A children's book was written a couple years ago entitled something like 'My Two Daddies'- I don't remember the exact title but its topic is fairly obvious. I bring this up because its an example of a book for children regarding homosexuality in a respectful, understanding manner. Yet this book does not contain any details concerning the specifics of their sexuality-simply that they love one another. Any book containing this type of material is (in my opinion) clearly acceptable for 2nd graders.

As to weather or not the sexual detail should be discussed and what age? That is entirely dependent on the local cultures acceptable age of sexual education. In America, sexual education is rarely covered before 5th grade so it follows that any book teaching hetro- or homo- sexual issues would be 'unacceptable'. This may not be the case in other nations where a younger age is 'acceptable'.

As to the heart of this thread- Parents right to choose educational standards over the government. A hard choice indeed. On one hand, the government should be making personal choices for capable parents, but parents not should be able to control (as individuals) the standards for all children's education. It seems that most schools have a system in place for this concern though- In the schools I attended, when it came time to be taught about Evolution and Sex, permission slips were handed out. If a parent didn't want these controversial subject introduced to their children by the school, they simply stated so on the slip and the child would be dismissed from those lesson (and not have their grade hurt either). While I understand that not all schools do this, every school Ive come across has had some forum for concerned parents to express themselves. Parent Teacher Associations help to serve this very purpose. Even Village Councils and High-level State have opportunities for the 'common man' to be heard.
I am not a parent myself, so perhaps some one could shed more light on what I'm getting at if they've tried themselves, but the avenues to cooperation exist here. Also, while I understand that some parents are too busy to do this, it seem to me that any sufficiently concern parent would Make the time. Perhaps my lack of experience is overly evident...please, anyone correct me where I falter.