“Hey, insular cortex, that does disgusting food… ‘Moral disgust’? I don’t know, that vaguely sounds sort of like that. Hey, somebody give me some duct tape. I’m going to strap moral disgust onto gustatory disgust.”
We mistake feeling disgusted by something as being a good litmus test for deciding what’s right and wrong. And what we know is somebody’s “disgusting, this is simply wrong” is somebody else’s “perfectly normal loving lifestyle”. And it’s tempting if your stomach is in a total uproar, you know, “if it makes you puke you must rebuke”.