“… and don’t forget to go to Helen’s on the way home!” my wife nagged. “Of course not!” I snapped, knowing full well I had already forgotten the instruction from earlier in the conversation, “Love you, see you soon.” Helen is my wife’s best friend of over thirty years. They went to nursery and school together, went to the same university together, had holidays together and was her bridesmaid at our wedding. That was the o...