Guys put on noticeable bulk over time, with bellies, pecs, and asses getting rounder and heavier from panel to panel. The art usually lingers on jiggling flesh, tight waistbands, and partners groping or riding the new mass while the heavier guy gets fucked or fucks with a more dominant, stuffed-out vibe. Sometimes it plays like feeder fantasy, with eating and body worship leading straight into sweaty sex and big loads.