Knock knock. Who's there? Someone too short to ring the doorbell.

Knock-Knock Who's there? Me DUHH!!

Knock Knock Who's there? Dustin Dustin who? Dust in the air, please let me in!

Knock, knock. Who's there? Dwayne Dwayne who? Dwayne the bathtub mommy, I'm dwowning.

Knock Knock! Who's There? Eileen. Eileen who? Eileen on the door until you open it

Knock, knock! Who's there, in th' other devil's name? Faith, here's an equivocator that could swear in both the scales against either scale, who committed treason enough for God's sake, yet could not equivocate to heaven. O, come in, equivocator.

Knock-knock? Who's there? Estelle. Estelle Who? Estelle am waiting for you to open this door!

Knock, knock. Who's there? Esther. Esther who? The Esther Bunny. Knock, knock. Who's there? Stella. Stella who? Stella nother Esther Bunny. Knock, knock. Who's there? Samoa. Samoa who? Samoa Esther Bunnies. Knock, knock. Who's there? Consumption. Consumption who? Consumption be done about all these Esther Bunnies? Knock, knock. Who's there? Esther. Esther who? Esther anyone else as sick of this joke as I am?

Knock Knock! Who's There? Dishwasher. Dishwasher Who? Dishwasher whay I sphoke vhefore I hafe fawse feeth (This was the way I spoke before I had false teeth)

Rich and Kim, a couple, were in a room when Kim asked Rich if he would ever forget her. He replied that he would never forget her. Then she said, "Knock-knock!" and, of course, Rich said, "Who's there?" "See!" she exclaimed sulkily. "You have forgotten already."