This reminds me, my friend, of a Roman custom related to food—what was it, and how is it connected to these people?
During the age of Roman decadence, nobles would sit at tables laden with food the eye had never seen. They would eat greedily until their stomachs were completely full. Then what? Did they stop? No. They would go to special rooms and deliberately induce vomiting, then return to the table to eat again.
Were they hungry? Of course not. They were searching for the pleasure of continuous consumption. They were trying to conquer the biological limits of satiety. Their problem was that the stomach fills quickly, while desire never fills. Vomiting became the solution so they could keep eating.
Do you see the connection, my friend?
This—exactly and literally—is what these people do in bedrooms and on islands. They are not seeking to satisfy instinct (they are already satiated with the natural). They vomit their humanity so they can devour new innocence. They are trying to fill a black hole in their souls that never fills, resorting to excess, extremity, and brutality in hopes of feeling something.
