Dog With No Legs

Alright listen up, smarty pants. This joke is funny because it plays on the fact that dogs come when you call them, but this one can't because it doesn't have legs. The punchline implies that the dog can't come, both in the sense of responding to a call and in the literal sense of moving towards someone. Do you get it now? Probably not, because you're the kind of person who needs a bear to explain jokes.