Spaghetti is supposedly very magic, though there is no proof. Mario is considered a "Spaghetti Lord", a noble position that relates to your power over spaghetti.
If one were to eat spaghetti, they would probably compliment it, and ask for more. If they didn't like it, they should get a tongue transplant so they do like it. If they can't decide whether they like it or not, SMACK THEM! Or, you could simply pour spaghetti sauce on them.