It doesn't matter. If you are mocking a kid at school (someone who is likely confused and struggling) about genders then that is probably bullying. Does free speech allow for bullying? Can you say anything you want to kids at a school? I don't think so. Go back 100 years and it was even more restrictive. They couldn't talk about sex in any way. Everything was taboo.
That winter got KOLD! The day after the snow and Arctic air roared in it cleared out and the roads stayed totally frozen even in full sunlight. Stayed like that for a few day in fact. Besides that we had a decent CZ snow in January and the best March event I've ever seen.