Three Ladies Getting Old! daft as a brush this one!?
The second lady chimed in, "Yes, some times I find myself on the landing of the stairs and can't remember whether I was on my way up or on my way down."
The third one responded, " Well, I'm glad I don't have that problem; knock on wood," as she rapped her knuckles on the table, then told them "That must be the door, I'll get it!"