I know a person who is a friend of a friend who always tell me, "Oh my god you're so thin, you need to eat more!" And I can't say back, "oh my god you're so fat, you need to eat less!" She would end up in tears and everyone would look at me like I'm the asshole. And I know when I try to explain that she was making fun of my weight first no would care because everyone knows only fat people hate the way they look.