Lady Tassia was pissed to learn that this slave was forgetful. She did not want to be the one to remind him all the time and she had to make him learn to remember things on his own. To motivate him to do so, she used her shit. The mistress cruelly had him eat her poo and she also made him drink her urine. He never forgot things after that.
Lady Tassia heard a lot about human toilets but today she wanted to try it for herself. She was tired of hearing about them and wanted to experience them for herself. So she got this guy and she turned him into a human toilet. He had pissed her off but she blew it out of proportion to justify what she wanted to do to him. That is how the guy found himself eating her poo.
Mistress Tassie has a fetish for outdoor pooping. She loves the fresh breeze on her ass as she takes a dump and she enjoys how she can just get up and walk away after she is done. That is why she loves to go to the woods and other remote areas as she knows she can do it without worrying about who is watching her or who is disgusted by what she does.