The most feared words in the English language are "knock, knock". Trust me. It doesn't get worse than that. Although ... "I have a riddle" comes close.
Here are a few gems from dinner, so you'll be prepared to torture your co-workers. Misery loves company, and all that.
What did Batman say to Robin before they got in the car?
Robin, get in the car!
What did Batman say to Robin before they got in the plane?
Robin, get in the plane!
What did Batman say to Robin before they got in the boat?
Robin, get in the boat!
What did Batman say to Robin before they went in the store?
Robin, go in the store!
What did Batman say ... And this goes on and on and on until I tuck them in and retreat. At least its replaced Cassie's favorite series of knock-knock jokes.
Knock-knock
Who's there?
Cow
Cow who?
Cows don't say "whooo" they say "moooo"
Knock-knock
Who's there?
Fish
Fish who?
Fish don't say "whoooo" they say "blub, blub"
Knock-knock
Who's there?
Duck
Duck who?
Duck's don't go "whooo" they say "quack quack"
Knock-knock ... which can go on as long as you can think of animals. And thanks to Dora and Diego we can think of LOTS of animals!
I sympathize. My older two are in the "Knock, knock" phase too. After they tell one, it's "Now you say 'Knock, knock' to me!", and I tell it back to them. And we go back, and forth, and back, and forth....
Oh, you poor thing! When my kids were little, Muppet Babies was a big thing, and Baby Fozzie would end every lame joke with "Waka, waka, waka!!!"
That phrase was how we knew when to laugh at the kid's jokes. They were SO bad!!!