An open letter to humanity

Dear Humanity,

When people lose weight, it is not polite to tell them that "quite frankly, you used to be quite plump before." It's just not, and there are no exceptions to this. In fact, when people have lost weight and you feel the need to comment on their appearence, which you needn't necessarily, a simple "You look great" will suffice. And if you do say this to someone, they are completely justified in telling you that you look as much like a shrivelled up prune as you ever did.

Just a tip