Knock, knock. Who’s there? Candace. Candace who? Candace be true, you don’t remember me?
Candace Knock-Knock
Explanation
Explain Bear
Hey, chucklehead! This here's a knock-knock joke. See, the setup is 'Candace,' and the punchline uses that name to make a play on words: "Can this be true." It's supposed to sound like you're askin' if it's really happenin'. Bet you're still trying to figure out how doors work, huh?