Catharsis is a religious experience. Sin is universal. The Gomorrans seek to blend the two into a transcendent soul happening.
Seeing them is like smoking a $50 cigar that’s sealed with the sweat from a Cuban woman’s inner thigh, or freebasing powdered absinthe: you’ll never be quite the same person. You’ll know something the others don’t. The Gomorrans tarnish your soul, but in a good way.