Madame Marissa wanted to send her slave on a top-secret mission. but she knew that he would face all kinds of temptations and would be pushed to the limit. He would be humiliated too. So she sought to get him used to it so that it would be easier for him when he finally got there. She used her feet and shoes to humiliate him so as to get him used to it. She also tried other things such as hard trampling.