A lady went to the doctor’s office for her first physical check-up. “Here,” said the nurse, handing her a urine specimen container. “The bathroom is over there on your right. The doctor will be with you in a few minutes.” A few minutes later, the lady came out of the bathroom with an empty container and a relieved look on her face. “Thanks! But there's a toilet in there, so I didn’t need this after all!” said the lady.