It’s simply propaganda starting young. The goal of all propaganda is to present things that are absurd and contrary to reality as truth. This way the subject cannot trust their own judgments and are fully dependant on an authority to tell them what to do. Not only that but anything can be indoctrinated and believed. Once the subject has given up their own ability to think for themselves they will be eager to to anything. Targeting sexuality’s things is just a way to get many people involved in its propagation unwittingly because the sex drive is extremely potent.
Last what they do is make it perverse or so called hate if you dare trust your instincts or even have an opinion about your sense of probity.
So the subject believes utter nonsense and is scared to have an opinion outside of it.