I found this joke a while ago and thought it was a keeper. For all you readers and writers out there, I think you will appreciate this as much as I did.
The Hungry Lion
A hungry lion was roaming through the jungle looking for something to eat. He came across two men. One was sitting under a tree and reading a book. The other was typing away on his typewriter.
The lion quickly pounced on the man reading the book and devoured him.
Even the king of the jungle knows that readers digest and writers cramp.
As you can tell from the typewriter reference, the joke is a little old, but I am still a fan.
End of book quote: “I take his hand, holding on tightly, preparing for the cameras, and dreading the moment when I will finally have to let go.” —The Hunger Games by Suzanne Collins
expressiverandomness 
Feel free to take the joke and update it as you like.
“Nothing, not love, not greed, not passion or hatred, is stronger than a writer’s need to change another writer’s copy.”
– Arthur Evans