Her friend is transgender. He "figured it out" when he was in gr.3 but nothing really changed until about gr.6. Then he started to explore more. She is just starting hormones now. They (daughter and friend) are now in gr.9 and they BOTH left the Christian school because the students there did not treat either of them very well (it's kind of a big "sports culture" and my daughter is far more bookish).
I'm not totally sure if there is an age when it's acceptable to say those things to....well....anyone but.
I know now yes. But for the last 50 years in schools, homosexual boys and girls have been reading exclusively heteronormative books (until maybe 10 yrs ago). And yet those gay boys and girls grew up gay...despite the books they read.
Why do you think the opposite WOULDN'T be true of your heterosexual children? Are your children weaker? Are the lessons and teachings you are giving your kids too weak?