E.g.: Was liebst du mehr, Mayonnaise oder mich?
What do You like better, Mayonnaise or me?
The point is, it's highly improper to not love a person in favor of a thing. Instead You can lighten it up a bit by just asking for what they like better.
The initial question is only askable among very close friends (Irony/Saracasm), usually not even for couples and definitely not for love interests or lose contacts.
Funny thing is, have You ever seen any human having this kind of teeth naturally? No? Good coz nobody has, maybe (just maybe) as replacements but that would be the really cheap ones.