Filth in all its forms: whimsical and mundane, literal and figurative. Kurt Andersen talks to America’s auteur of the scatological, filmmaker John Waters. Writer Henry Alford and comedian Dave Hill visit a museum exhibit where all the art is made of dirt or trash. Who’s selling and who’s reading the smutty bestseller, “Fifty Shades of Grey”? We get to the bottom of the the shockingly complex world of diaper design. And indie rock band Dirty Projectors performs live in our studio.