Dog with No Legs

Listen, you brainless mammal, you clearly don't get it. The joke is funny because it sets you up with a question about a dog. You're thinking about a cute dog, maybe with a funny name, but then it punches you in the face with the fact that the dog can't move. It doesn't matter what you call it because it's not going anywhere, meaning that the initial question is pointless. You're probably so dumb that this explanation sounds like another language.