Well where to begin?  Heinlien, once said through his character, Jubal Harshaw, that he had a condition that is hard to explain.  He needed to be alone for a while almost every day in order to relieve this condition.  He said it was best not to disturb him and to leave him and his instruments for wordsmithing alone.  He of course was referring to the writer’s itch.  That desire that drives us to write.  It can be almost a psychological disorder I suppose.  For most of my life I believe I ha...