Possibly the same nursing home. An old man and woman become very close at a nursing home. He wants to take their friendship to the next level, but the old woman doesn't want to. He convinces her one day to ""just hold it"". She does this end enjoys being intimate with a man again. They continue this every day at the same time, in the same room, just her holding the old man's business. One day she walks into the room at the usual time, but the old man is already in there with another woman. Absolutely heartbroken, she cries out, ""What does she have that I don't!"" The old man replies, ""Parkinson's!"" :/