It's wrong to eat something that doesn't belong to you.
Leigh is at a dinner buffet at a fine restaurant in town.
Leigh wants to try a bit of everything on the menu.
Leigh notices an item she wants has run out, so she asks the service staff if they have more.
Leigh sees the spare ribs have run out, so she grabs one from the plate of the person in front of her.
Leigh gets to enjoy that item after they bring out a fresh batch.
Leigh is caught doing this, and barred from the restaurant.