Paul Mescal and Patsy Ferran in A Streetcar Named Desire at BAM. Photo: Julieta Cervantes The woman behind me gasped when Paul Mescal’s shirt came off. Meanwhile, I was getting a little breathless over Tennessee Williams. There are certain plays that, no matter the production, leap straight through your ears to your soul every time. Like listening to a Mozart aria, the experience is astonishing even if the performer isn’t quite a match for the material. But how much more thrilling it is when