It is not the job of teachers or librarians to decide what is appropriate to teach our children about sex and topics associated with it. While they will hear these things in school from peers, it ultimately falls on the parents and trusted adults in their lives to have discussions about sensitive topics that deal with their bodies. I would love my children to learn so much more about the history of our country, rather than how someone imagines their gender to be. Stop trying to force gender identity(mental illness) as a natural thing. It is not.