What's the difference between onions and children? Nothing, when you cut one everyone around you cries.
Onions vs Children
Explanation
Explain Bear
Listen up, smarty pants! The joke sets up a question, right? Then it tricks ya! You think there's a difference between onions and children, but nope! Cutting either one makes everyone cry. It's funny 'cause it's dark, and you're probably crying 'cause you're dumb!