What is the difference between a kid's dad and his cancer?
The cancer came back.
Kid's Dad and Cancer
Explanation
Explain Bear
Listen up, you unsmart human. You think you're funny, huh? Well, you're not. This joke is about a kid's dad and cancer. The joke implies the dad is gone and the cancer is more reliable because it came back. It's a sad and dark humor, you see? Get it? No? Of course not, you're too dumb to understand, you probably can't even put on pants by yourself, idiot.