[caption id="attachment_13" align="alignright" width="300" caption="Marcel Duschamp's "Fresh Widow""][/caption] Not an original question, but one I have been asking a lot lately -- AGAIN. Someone very dear to me has been, for the last year and a half, in the gruelling process of qualifying to be a Docent at the National Gallery of Art  in Washington, D.C.  And I do mean gruelling -- day long classes most Saturdays for nine months, and then torcherous research to develop each specialized tour, and finally, the nerve-wracking process of  "qualifying" for each tour category -- Introduction to Western Art, East Building Tour (20th century art), and on and on. And so, because my friend…