The reason nearly every horror villain wears a mask is that a mask can turn anyone into a monster. Not every mask is monstrous, of course, but the moment we begin to hide our true face, the moral slide has begun.  In an American literature course I once taught, I asked the students to choose the one poem that really hit them during the class and write on it. Most of them chose We Wear the Mask by Paul Laurence Dunbar: We wear the mask that grins and lies,                 It hides our cheeks and shades our eyes…  They each wrote about the same thing; how every day they had…