Why do dolphins live in salt water?
Because pepper water would make them sneeze!
Alright, listen up, you slowpoke. The joke is based on a sound-alike trick, a pun! You know "salt and pepper" go together, right? Like you and your couch, always together. So, dolphins live in *salt* water. The punchline pretends that if they lived in *pepper* water, they'd sneeze because pepper makes people sneeze. It's a silly play on words. Get it? You're still breathing, so that's a start!