Madame Marissa felt that she had to torture this guy and she did so using her dirty feet. She had the guy lick them and she made sure that he licked them until they were clean. Thereafter, the mistress warned him never to piss her off if he wanted to avoid such a punishment again. He knew better than to piss her off as he now knew what she was capable of.
Mistress Lena has a foot fetish and she loves to have her feet licked clean and it also turns her on when it is done right. So she had to make sure her new slave had to know how to do it since it was a big part of fun for her. So she came with dirty feet today and she instructed him how to lick them and he did it right.
Mistress Alexis had never punished her slave and she felt that he was becoming too comfortable and doing things the way he wanted and not the way she wanted them to be done. So she used her sneakers and her smelly feet to punish him. He was forced to lick them all and warned that if he did not improve, he would have himself to blame for what would happen.