Riddle me this, Batman, what's long, round, and has cum in the middle?
Batman: A dick.
Riddler: NO NO NOOO! It's a cucumber!
The Cumcumber Riddle
Explanation
Explain Bear
Alright, listen up, genius. The joke plays on what you THINK the Riddler is talking about, which is a dick, but he's actually talking about a cucumber. It's funny because it's unexpected. And you fell for it, you dummy.
Wade
Joker: You’re a dirty boi Batman!