Gotcha!  Not the fingering you were expecting.  I'm not THAT vulgar.  This art is done by Judith Braun, and she uses her fingers.  This is the second most useful thing you can do with your fingers.  I will leave the first most useful thing for you to decide.  Judith uses charcoal and her hands to create works of art.  She was on Bravo's reality show "Work of Art,"  which I enjoyed.  Although I will say that I am tired of Bravo pumping out reality shows based on the structure of Project Runway.  It's a little monotonous.  But hey, I still love it.

Over and Out,
GingerQueer