Freda and Mona, two elderly ladies, were enjoying the sunshine on a park bench in Edgware.  They had been meeting in that park every sunny day for over 12 years... chatting and enjoying each other’s friendship.

One day, Freda turns to Mona and says, "Please don't be angry with me dear, but I am embarrassed, after all these years. . . What is your name?   I am trying to remember, but I just can't."

Mona stares at Freda, looking very distressed, and says nothing for two full minutes. Finally with tearful eyes, says, "How soon do you have to know?"