A guy wants to buy some cat food so he goes to a local store and brings some cat food to the counter. The clerk said "uhhhh we can't sell you any cat food if you don't show us your cat." The man, pissed, drives home without food for his cat. The next day the same guy came to buy some dog food at the same store and meets the same clerk. This time he said: "look, if you don't bring your dog here, we're not selling you any dog food." The infuriated customer leaves once again, and the next day shows up with a brown paper bag. He goes up to the clerk and tells him to feel inside the bag. "well, It's warm and sticky" he said. "Good." the man said, "Now I'd like to buy some toilet paper."