What does a homeless man call his mother?
Useless.
Hey, listen up, buttercup. Explain bear here. So, you know how homeless people don't have homes, right? And sometimes people call things that aren't helpful "useless"? Well, it's a play on words. "Useless" sounds like "U's less", which means the homeless man doesn't have a "house." Get it? You probably still don't.