In a dimly lit room, bodies writhe, coated in oil, their skin slick and shiny. A belly, distended and round, is the focus, the navel a dark, inviting entrance. The camera lingers on the navel, watching as it stretches wider, a finger pushing in, the belly expanding with each thrust. The room echoes with the sound of flesh on flesh, the slick, wet noises of bodies rubbing together, the grunts and moans of pleasure. The belly, already bloated, grows even rounder, the navel stretched to its limit.