Teachers don't talk about sex in any class other than sex ed. Sexual orientation includes both romantic and "sexual" attraction and therefore you can absolutely talk about sexual orientation, gender identity, etc without talking about sex. Conversations like "you're allowed to have a crush on someone the same gender as you" or "sometimes people have two dads" or "Billy wants you to call her Tammy now" have nothing to do with sex.

Again, no one is saying teachers NEED to discuss these things. Just that they should be allowed to. And it goes beyond teachers. "Don't say gay" bills would ban library books, restrict counselors, and enforce censorship filters, taking away resources from kids who WANT to learn more about why they are the way they are. And I think that's cruel.