Two ladies had been friends for decades. Every day they sat together on a bench in the park and chatted.

One day, one lady told the other, "This is terribly embarrassing, but I hope you understand. You know how it is to be old. I keep forgetting things. I have to tell you, my dear friend, that I simply can't remember your name. Could you please tell me your name again?"

The other lady looked at her for a long time, and asked, "How soon do you need to know?"