Three older ladies are discussing the trials of getting older. One says, “Sometimes I catch myself with a jar of mayonnaise in my hand in front of the refrigerator and 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 whether I was on my way up or on my way down.” The third one responds, “Well, I’m sure glad I don’t have that problem, knock on wood.” She raps her knuckles on the table, then says, “That must be the door, I’ll get it.”