You shouldn't be sloppy while eating.
Jeremy is sitting at a fancy restaurant with a girl he met at school.
Jeremy wants to eat his dinner.
Jeremy tucks his napkin into his collar and carefully digs into his dinner.
Jeremy doesn't even grab his silverware, he just grabs the food with his hands and shoves it in his mouth.
Jeremy feels excited that he and the girl had a nice date.
Jeremy feels embarrassed when the girl he's with scolds him for being so messy.