Mistress Sabina likes to make people change and when she noticed this guy's uncouth behavior, she felt that she was doing the community a favor by making him change. Since she did not have a lot of time to make him change, she had to use the most effective method to do it and so she chose to pee on him. She warned him that if he did not change, she would shit on him and that threat stayed with him and prevented him from being uncouth.