What should you name a dog without any legs?
It doesn't really matter. No matter what you yell, he's not coming.
Okay, listen up, buttercup. This joke is funny because it plays on the idea that dogs usually come when you call their name. But if the dog doesn't have legs, it can't come no matter what you call it! It's a knee-slapper! It is sad though because that dog has no legs, and you are probably not very smart. Just kidding, you seem alright.