This mistress felt that she had to dominate and humiliate this loser as cruelly as she could. And that is why the mistress had to humiliate the guy using any means necessary to make sure that he changed his behavior and did things her way. She did not want a dirty slave in her house and that is why she had to make sure he became as clean as she wanted.
This mistress wanted to shit on this guy but she knew that she had to find an alternative way to do it. She did not want to just shit on him like other mistresses did it. So she came up with an improvised toilet seat and she used it to shit on the guy. He was on the receiving end of her shit and he ate all of it as per her directions.
This guy was a fool according to this mistress and she had to find a suitable way to communicate with him. He did not know what she had in store for him and he had the shock of his life when she implemented what she thought would work. In a short while, the slave was eating her shit and he had to learn to do what he was asked because if he did not, it would lead to more suffering for him.