A man goes to the supermarket

A man in a supermarket goes up to a cashier and places two cans of dog food on the counter.

The cashier asks, "Do you have a dog sir?" "Yes, it's at home," replies the man. "To be able to sell you the dog food sir, I must see the dog. That is store policy," says the cashier.

The next day, the man goes and places two cans of cat food on the counter. Again the cashier asks, "Do you have a cat sir?" "Yes I do, it's at home," replies the man. "Well I'm sorry sir. Store policy. I must see the cat before I can sell you cat food," replies the cashier.

The next day, the man returns to the store and walks directly to the same cashier. He has a brown paper bag in his hand. "Here," he says to the cashier, "put your hand in here." The cashier puts her hand in the brown paper bag. "It is all soft and warm," she says. "Yes that's right," replies the man, "I need to buy two rolls of toilet paper."