Have you ever smacked your lips while eating?
You hear some food or another is lip smacking good, have you ever encountered that? And if so, was it done out of actual enjoyment of the food? Because I feel like I've only really encountered it in fiction, and it's usually ascribed to people to either making them seem disgusting or obnoxious. They're doing it to annoy someone at the table that criticized their manners, or the person has an unsteady stomach, and can't handle food at the moment. That kind of thing.