If people can joke about a fatness induced by disease, it's perfectly ok.There are jokes on all kinds of built. Fat, skinny, overweight, too tall, too short etc etc... Now if you are not that skinny, smile the joke out and learn some jokes on the skinny people to throw at them. These will never stop. There is even one kind of face which is a joker face. Jokes on looks will be their till the End of the world.I'm sure you do laugh on looks yourself on daily basis, but when it comes on you, learn to laugh on it please.😆