Over time any word can become offensive, and people have to look for new words to replace them. Fat used to be a cool word, now it's offensive. So is 'chubby', which used to be a cute word, just like plump. But even plump is out now, and we just have to go with the flow. Curvy is the in thing now. But I agree with you that fat people are NOT curvy, even if that's what they call themselves nowadays. Before, I used to think that curvy meant having curves, but I guess that's not it anymore. So, when reading people's profiles, I always have to mentally adjust "curvy" back to "fat" in order to get a more accurate idea of their physical description. The good thing is that even the word "curvy" will go out of fashion and become offensive someday, because nobody would want to be associated with it as more and more fat people begin to call themselves curvy. If we're lucky, "fat" may come back into vogue.