Cock ***1/2
Jason Butler Harner, Cory Michael Smith            By: Sam AffoumadoCock is the provocative title of Mike Bartlett's Olivier Award-winning new play making its American premiere at the Duke on West 42nd Street. The Royal Court Theatre's production, directed by James Macdonald, is playing here with an American cast. Upon entering the theater you are led to a spherical, plywood coli…