Three older ladies were discussing the problems of getting older.

One declares, "Sometimes I catch myself in front of the refrigerator with a jar of mayonnaise in my hand, and for a brief moment can't remember whether I need to put it away, or start making a sandwich."

The second lady chimes in, "Yes, sometimes I find myself on the landing of the stairs, and can't remember if I'm on my way up or down."

The third one responds, " Well, I'm glad I don't have that problem; knock wood," as she taps her knuckles on the table. "That must be someone at the door, I'll get it!"