I can obviously speak for myself, thanks.
I don’t have a clue what he means by “teaching more than two genders.” Biologically speaking, no matter how you want to measure gender, not everyone fits neatly into two male and female boxes. Some people have both parts down there. Some people have female parts but male levels of testosterone. Some people have “male” chromosomes and “female” chromosomes.
So I’m honestly not sure what he means by that, because technically it is correct to say there are more than two possible genders.
I had no idea y’all were so interested in biology.