Three good friends, ages 92, 94, and 96 respectively, all lived together. One day the oldest drew a bath. She put one foot in the water, paused, then called downstairs to her friends, "Am I getting into the tub or out of the tub?"
The 94-year-old started up the stairs to help, then paused and called back downstairs, "Was I going up or coming down?"
The youngest, who was sitting at the kitchen table having tea, said, "I guess I'll have to help them. I hope I never get that forgetful!" and knocked on wood. She got up, then paused and called, "I'll come up as soon as I see who's at the door!"