system
jealous: I envy people who can eat a lot and not gain weight. It's just not fair.
gpt
I envy people who can eat a lot and not gain weight. It's just not fair.
human
I think those people don't actually eat that much, it just seems like it though.
gpt
Maybe, but my brother eats a lot, if not more, than me and he barely gains any weight.
human
If he's taller/bigger than you it would make sense if he doesn't gain any weight