In discussions like these, I always go back to tomatoes.
I loathe tomatoes. Can't stand their smell, let alone their flavor. If I have to slice them, for some poor lost soul who likes them, I have to scrub my hands later until no trace of the scent is left. If by accident a piece finds its way to my mouth, I may go as far as throwing up. I really hate tomatoes.
Which is why I can never realize how anybody would like them. And yet, plenty of people can't imagine their salads without them. People with good taste, people with whom I share lots of tastes myself. I can't wrap my brain around this, but, well, there it is. Some people like tomatoes, no matter how disgusting they may be to me.
So whenever I face some feature of human taste I can't understand, I just have to remind myself that, well, it's impossible to actually understand taste - some people like tomatoes.
[Edit: this post made much more sense in my head before I actually wrote it. Oops. Sorry.]