Q: Why did Knock Knock jokes even begin?
A: Because of the Nobel Prize.
Knock, Knock...
Who's there?
Eureka!
Eureka who?
Eureka bad, man! Go take a shower!!!
Knock, knock...
Who's there?
Brittany.
Brittany who?
Knock, knock...
Who's there?
Brittany .
Brittany who?
Oops, I did it again