Actually, if you follow the science, a variety of strange mutations and behaviors can emerge. Especially for a population that has been complacent and not had to fight for its survival for generations. You should look up that one experiment where they made a utopia for mice.
This is how evolution really works. A lot of different things can happen. Sometimes it works and the mutation thrives. Or it fails and it dies out.
Emergant behaviors like homosexuality and transgenderism is NOT against nature. However, it is natural that such traits would not reproduce.
I don't have anything to say about actual social engineering and grooming though, except that **** is just wrong.