Pets don't know what the words mean. I have called my cats all kinds of names and nicknames - Stinkeroni, Ugle, Numnutz, Hissy, Iggerant, just to name a few. But they are lavished with affection, physically and emotionally, are fed the best food, see the vet at least once a year, have warm, safe places to sleep, have never been hit, abused, or hurt, and Pepper buzzes just as loudly whether I call her Pepper or Stinkbutt. I'm sure Worthless and Yin Yang are the same way!