re: If homosexuals are “born that way”

This will be kinda basic (no expert) but is thought to be developmental, possibly with multiple genes involved. Can also be from stress or medical/chemical on the mother during pregnancy. They dont really know for sure. But XY triggers production of male horomones. If at any stage of development one of the hormone surges fails, the individual can end up not fully masculinized. Physically in intersex genitals or incoplete male development of genitals, and also in the brain. Opposite can happen to females during development but is less often. This why the social grooming is alarming as ftm now outnumber mtf and combined with the rush to transition without adequate couseling/therapy is gonna be a big problem in the next few years.

Again, is relatively rare and should not see 20% of a school classroom claiming lgbt.