Mistress Medea needed her new slave to eat poo and she had to make sure that she taught him. The mistress felt that he needed to know it and that he had to learn to get scared of her. That is why she did it and it was a lot of fun for her. The mistress loved what she saw and she knew that she wanted to do it again.
This guy was used to being destructive. He loved to destroy things including friendships and it got to a point that people could not avoid him or assume him. He tried to mess with mistress Medea and he regretted it as she came out swinging. She used her shit to dominate him and that is when he realized he could not afford to keep doing that shit anymore. He changed.
Mistress Medea could not believe the shit this guy had done and she had to punish him. So she made sure that he got what he deserved. That is how she slapped the crap out of him and when he thought that was the end of it, she went ahead to make him drink her pee and eat her shit. He never messed again as he knew the price to pay.