Characters have metal jewelry punched through their nipples, like barbells, rings, or little captive beads that catch the light and frame the areola. Artists tend to linger on close-ups during groping, licking, and fucking, with the piercings tugged, pinched, or pulled to sell the sting and extra sensitivity. The hardware can also read as a punky, kinky vibe that makes the chest feel more “used” and intentionally sexual.