Every night this old guy would sneak into the old lady's room. They would watch late night TV and she would hold his c**k in her hand.

One night, he fails to show up. She sees him in the dining room the next day, but he doesn't show up again that night. Finally, she confronts him. "How come you don't come by anymore?" she asks. "I've got a new girlfriend," he replies. Furiously she asks, "What's she got that I don't have?" He replies, "Parkinsons."