I grew up in a very homogenous white-bread town in the late '70s and '80s. When I was a kid, “gay” was a general insult, like “jerk” or “moron”. It didn’t have anything to do with actually being gay. I think there must have been some gay kids at my high school, but 1985 Montana did not really invite coming out of the closet. It’s not really a rabidly homophobic place, but it is very much a “you mind your business and I’ll mind mine” sort of place, so declarations of sexuality – and behavior that made you different, like “acting gay” – would not have been approved. So I didn’t really have any awareness of homosexuality one way or the other as a kid – didn’t know anyone who was gay, didn’t really know what being gay meant.
BUT I was raised by a Republican father of a decidedly liberatarian stripe. He took the “you mind your business and I’ll mind mine” mindset to the logical conclusion, and taught me to do the same: If it doesn’t harm you or society, then it really isn’t any of your business. It isn’t your place to make moral decisions for others. Every person must make their own choices and be responsible for them. If a person is a good person and keeps his or her word, that’s all you need to know about them.
So when I woke up to the fact that some people were gay and that actually had some relevance to society and life, I couldn’t see what the big deal was. Having some fundie tell me it was “wrong” didn’t sit well, because I was raised to believe that no one else got to decide for me, or anyone, what was “wrong” or “right” unless the action caused harm. And I just never could see what harm being gay caused.