Why do some people gain weight fast, but others can't gain any weight?

@Fluffybull He didn't say much about it, Fluffy, but just told me I needed to eat more. 🙈

@Manfredthemanic Perhaps he thinks your diet is quite restricted for a growing young person.

@Fluffybull Maybe, Fluffy. Hopefully, he can tell my parents so I can eat more and grow properly. 😊

@BritishPerson I know, Sir. I'm sorry.

@Manfredthemanic No need to be sorry about anything, young man.

@BritishPerson Okay, good! I didn't want to offend you, Sir. My doctor just thinks I should gain weight to keep growing properly and get muscles I want.

@Victorian Yes, I know. But some people can gain weight by rating badly or a lot and I can't. 🙈

@Manfredthemanic You're probably the weight you're meant to be, then. As long as you're fit and healthy. It's probably better for you than being overweight.