Create a scenario where a character explicitly requests humiliation during sex ('Call me worthless while you fuck me'). Show negotiations: agreed-upon slurs, hard limits, and post-scene reassurance. Use specific, visceral language ('Your pathetic moans sound like a stray dog’s whimpering'). Contrast the degradation with tenderness – tears of arousal mixed with post-coital cuddling. Add stakes like accidental overhearing (roommates hearing insults through walls) to test the characters’ commitment to the dynamic.