It could be funny, with the guy making funny faces or having a messy eating style.
The scene could vary. Maybe the guy is sitting in a park, peacefully eating the sandwich. Or perhaps he's in a rush and gobbling it down. It might even be a cartoonish exaggeration with the sandwich being huge and the guy having trouble handling it.
Well, it might show the fat guy enjoying the sandwich slowly, savoring each bite. Or perhaps he's having trouble holding the sandwich because of his size.
He might look excited or hungry, ready to enjoy the sandwich.
It could be a cute and simple scene. Maybe the girl has a big smile on her face as she enjoys the sandwich.
It could be really cute. Maybe she's sitting happily, taking small bites and enjoying every moment.
The scene could feature the boy sitting on a bench by the street, taking bites of the sandwich while looking at the passing people and vehicles. Maybe there's a little dog watching him enviously. Or it could be that he's in a school cafeteria, chatting with classmates as he eats.
It could show a man sitting at a table, enjoying his sandwich with a satisfied expression.
It could be that it's his favorite kind of sandwich, or he just needed a quick snack. Sometimes in cartoons, characters do random things for no specific reason.
The cartoon dog might be eating the sandwich because it's part of a funny or interesting story. Or perhaps it's just a random act to add some fun to the scene.
The scene of a fat guy eating in a cartoon could be depicted as him devouring a massive hamburger, with crumbs falling everywhere and his eyes closed in delight.
It could be a funny scene with the guy making a mess while eating.