This guy was bigoted towards bbws. They did not want to let him continue having such behaviors so the mistresses used their big asses to teach him a lesson. He was forced to endure their farts and their facesitting. He could not believe what the mistresses did to him but he had no choice other than to do what the mistresses wanted him to do. He learned from that punishment.
Lady Phoenix had never punished her slave before and she had never farted on anyone before as well. But she had gotten to a point where she felt that punishing her slave was important and she had to do it. So she summoned him t her bedroom and she turned him into a fart slave. He was choked as she farted on his face as she smothered him with her butt.