Knock On Wood


               Three sisters ages 92, 94 and 96 live in a house together.

               One night the 96 year old draws a bath. She puts her foot in
          and pauses. She yells to the other sisters, "Was I getting  in or
          out of the bath?"

               The 94 year old yells back, "I don't know. I'll come  up and
          see." She starts  up the stairs and  pauses. "Was I going  up the
          stairs or down?"

               The 92 year old  is sitting at the kitchen  table having tea
          listening to her sisters. She shakes  her head and says, "I  sure
          hope I  never get that  forgetful." She  knocks on wood  for good
          measure. She then  yells, "I'll come up  and help both of  you as
          soon as I see who's at the door."