Knock Knock jokes+Images | *Knock*Knock* Who's there? You know. #59

*Knock*Knock* /  —"Who's there?" /  —"You know" /  —"You know who?" /  —"You know who"
*Knock*Knock* / "Who's there?" / "You know" / "You know who?" / "You know who"
https://100xhahaha.com/pic!e25cfa90_sf.jpg