Try And Remember This Joke

Three old ladies are discussing the state of their memories.

The first one says, "Sometimes I find myself in the kitchen with a loaf of bread open and I can't remember if I am starting a sandwich or putting the bread away."

The second lady then says, "I find myself on the landing halfway up the stairs, but can't remember if I were headed up or down."

The third lady boasts, "Well I have to say that my memory is still perfect, knock on wood!". She raps the table loudly with her cane and immediately calls out, "Hold on ladies, let me see who's at the door."