A burned-out partner formalizes a BDSM contract to become their dominant's sex object, relinquishing all decisions and autonomy.
Herodotus
3 stories.
A man fulfills his toilet fetish with a German domme who trains him to drink her piss and eventually shit in his mouth.
A submissive man trains to be his domme's toilet, facing challenges and gag reflexes in an intense morning session.