I did actually choose innate intentionally. While I'm sure trying to prove it would be an absolute bitch, it's not unreasonable to suggest some people's homophobia can be innate in the same way homosexuality or asexuality can be. Some people are just built that way.

In any case, I think the mechanism is somewhat irrelevant when it comes to my point. If you think something is disgusting but you know it's fundamentally harmless, well, learning to get along is what it's all about!