Dexter told Delilah that he had just heard a good cat joke and asked if she wanted to hear it. She did.
He said: "What is the difference between a cat and a comma?
Delilah didn't know what the difference is.
"One has the paws before the claws and the other has the clause before the pause."
Delilah started laughing hysterically (as you can see in the photo), but Dexter wasn't fooled.
"It wasn't THAT" funny he said looking at her suspiciously.
"Oh" she said. "I didn't know what a comma was so I didn't understand the joke."
"Kittens" said Dexter in disgust as he sauntered out of the room with his tail swishing.