it's tough getting old

KNOCK ON WOOD: Three elderly sisters lived together, and one night the 95-year-old sister went to take a bath. She put a foot in the tub and paused. "Was I getting in or out of the bath?" she yelled to her sisters. The 93-year-old sister yelled back, "I don't know. I'll come up and see." She started up the stairs and paused. "Was I going up the stairs or down?" she yelled to her sister below. "I hope I never get that forgetful," thought the third sister, knocking on wood. She then yelled to her sisters, "I'll come up and help both of you as soon as I see who's at the door."