How to avoid bad knock-knock jokes:
"Knock knock."
"Uh...come in!"

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The Nerdfighter's Joke Book
Humor♡A JOKE BOOK♡ A collection of witticisms for nimrods. ❝How did the hipster burn his tongue? He drank coffee before it was cool.❞ [COMPLETED] Random #456 Humor #651 © 2014 AvalonIsely
►Avoiding Knock-knock Jokes
How to avoid bad knock-knock jokes:
"Knock knock."
"Uh...come in!"