Did you hear about the guy who invented the knock knock joke? He won the "no-bell" prize!
Knock, knock! Who's there? Opportunity! That is impossible. Opportunity doesn't come knocking twice!
Me: "Will you Remember me in a day?" Her: "Yes." Me: "Will you remember me in a week?" Her: "Yes." Me: "Will you remember me in a month?" Her: "Yes." Me: "Will you remember me in a year?" Her: "Yes." Me: "Ok, I have a joke. Her: "Ok." Me: "Knock, knock." Her: "Who's there?" Me: "You didn't remember me."
Knock, Knock! Who's there? Doctor Doctor who? That's a great TV show, isn't it?
Knock-knock. Who is there? Stopwatch. Stopwatch who? Stopwatch you're doing and have a happy Valentines Day!
Kock, Knock Who is there? Suck, suck. Suck, suck who? After a long pause with a low voice: My dick; dear!
Knock knock! Who's there? Ice cream! Ice cream who? Ice cream land on you!
Knock Knock. Who's there? Opportunity. Don't be silly - opportunity doesn't knock twice!
Knock Knock! Who's there? Testicules. Testicules who? Pillow for penis .
Knock knock. Who's there? Sarah. Sarah who? Sarah problem here?