“There is no biological, physical evidence of “gay” DNA or other non-experience-based triggers for same-sex orientation.”
Some of that is by design. If they find a gay DNA marker, we would be able to determine who is gay and who is not. What if we find that Elton John or George Michaels or whoever don’t have this marker? That would lead down the path to “chosen lifestyle” which eliminates civil rights.
good observation.