A friend shared this experience with me yesterday.
She said that a woman she knows was riding in the car with two grandchildren. In an effort to keep them entertained she handed them two magazines and told them to look through them and then trade. After a few minutes her little grandson started laughing and said, "look Grandma, this kitty really really has to go to the bathroom!"
She had the children exchange magazines and immediately her grandson started laughing again. He said, "Look grandma, this lady has to go to the bathroom too!"