Man: I'd like to buy some dog food.
Check-out Lady: Do you have a dog?
Man: Yes.
Check-out Lady: Where is he?
Man: He's at home.
Check-out Lady: I'm sorry, I can't sell this dog food to you unless I see the dog. Store policy.
The next day, the man returns.
Man: I'd like to buy some cat food.
Check-out Lady: Do you have a cat?
Man: Yes.
Check-out Lady: Well... where is he?
Man: He's at home!
Check-out Lady: Sorry, I can't sell this cat food to you unless I see your cat.
The following day the man returns.
Check-out Lady: What's in the sack?
Man: Put your hand inside.
Check-out Lady: Hmmm...It's warm and moist! What is it?
Man: I would like to buy some toilet paper.
