It's the same idea as telling someone to eat a salad. It's saying "Change your behavior to conform to my ideal of how you should look." And frankly, it's none of your business. The only times you should have a say in what someone else is eating is if you're a doctor, you're a parent feeding your child, that person has asked your opinion, or what the person is about to eat is poisonous.
Just like people have naturally larger body types, some people are just naturally thinner. That's okay, too, y'all.
Some people put a lot of thought into their diet, exercise regimen, lifestyle so that they have achieved the body that want, or are working towards it. They have & are working hard for it. And here you are, telling them that their hard work was for naught or that the path they've chosen for their own body isn't the right path.
This is something that I hear a lot of. And it does bother me. Not a lot, but it is mildly annoying. My body is my own, & I do not need someone else to tell me what to put in it. Yes, I do occasionally eat cheeseburgers. One if my favorite things on this earth is a double cheeseburger with extra pickles from Five Guys. But my diet is my own business, & I'm an adult who is capable of making my own decisions about with what foods I'll fuel the only body I'll be given in this lifetime. And I choose to eat healthier (the majority of the time - life is too short to not treat yourself occasionally) because I happen to like the way my body looks when I put the effort into it. I do not appreciate my efforts being dismissed simply because someone else thinks their opinion about my body is so important that they need to give me instructions on how to fix whatever they feel is wrong. I know I'm not overweight. I know I'm small. I have a small frame. But I also know that my body can be improved upon, according to my opinion of it - which is the only one that matters.
It would be super rude of me to tell someone to eat a salad. How is telling someone to eat a cheeseburger any different? Besides, I would never tell anyone to eat a salad, because someone else's diet is none of my damn business.
