If all sex is, as taught in schools since it was introduced, is the "scientific mechanisms" ie; this body part produces this function for this purpose, then sex can be divorced from all morality which is where we find it now.
I sort of disagree with you here. When you start from the realities of biology you tend to end up at normal sexual mores. As an example, if you only have sex with one person who you know doesn't have any STDs, you don't have to worry about STDs. I find that nowadays people are overly cautious when it comes to safe sexual behaviors or overly libertine when it comes to risky sexual behaviors. You don't need to wear a condom if you're in a monogamous relationship. You really shouldn't have sex with other men if you're a man, but we can't say that because it would hurt people's feelings.
At any rate, these people want things both ways. They want to say that their education is based in science and not morality, but they are deathly afraid of offending homosexuals, trannies, etc. I was lucky enough to more or less figure this stuff out on my own but many teenagers are not.
Well, people should at least give it some thought before they have their dogs castrated. But it is ultimately an option, because they're animals. It's hard to even understand the mentality of people who would castrate, mutilate, etc. other human beings. You can justify doing it to an animal. If you do it to a fellow human being you yourself are not human.
The past is diverse. The future is diverse. Homogenous nations have never existed. Diversity is natural and impossible to reverse. You're a bigot for even noticing that they're pushing an agenda with their choices, much less engaging with their flimsy arguments and exposing them. Their only goal is to convince you that this is the way things must be.
My favorite example of that was when Pornhub had an AMA on reddit, and someone questioned the large amount of incest porn they were pushing. The Pornhub representative immediately cried about antisemitism. Very interesting.
I feel the need to remind everyone that Keffals did not in fact fool any straight men into thinking he was a woman. That is just his sexual fantasy. Even if you are calling it bad, if you are accepting that it happened you are playing into his sexual fantasy. Don't do that.
See for example Sub-Saharan Africa, which has high rates of heterosexual transmission of HIV, seen nowhere else in the world.