Three elderly women were discussing the problems of growing old.
One said: "Sometimes I find myself in front of the refrigerator with a jar of mayonnaise and I can't remember if I am putting it away or making a sandwich."
Another said, "And I can trip on the stairs and not remember if I was walking up or down."
"Oh well, I don't have those sort of problems, touch wood," said the third, tapping her knuckles on the table, before adding, "That must be the door - I'll get it."
