I think maybe a lot of people don’t think too deeply about what sort of sex act homosexuals do, and how it is tied to disease and misuse of body parts. I have a friend who sort of naively pictures nice men, earnestly in love, holding hands, I think, when she is arguing for “fairness” from the Catholic Church. I’ve tried to spell it out for her, but she doesn’t want to picture it [well, ok, who does?].
My Mom was visiting us once, with a friend who was also in her 70's. We happened to be watching a news report about a Gay Pride parade, and my Mom's friend asked me to explain how men have sex with each other. Imagine having to explain that to an older woman. She was horrified and disgusted.