Some people associate good health with weight gain.I've heard people say things like "Oh, you're putting on some weight. It looks good on you."
It's nice to pay a compliment to someone.
And even nicer when you're not the one carrying around an extra twenty or thirty pounds.
To be too skinny is not good. Nor is carrying too much weight.
But I digress...
In fairness, normalized weight gain that balances with height and frame does look good. But who has that?