Lady Zora loves her nylon pantyhose because she knows that it sweats easily and so she can use it humiliate someone. The mistress wanted to make sure that she made this slave so humiliated that he would never forget her. The mistress laughed at the loser as he licked and smelled her sweaty pantyhose and told him that that was what he got when he messed with her. It never happened again.
Lady Zora had never tried chastity humiliation before and she had to find a way to try it. It looked like it was fun and that is why she was dying to try it. The mistress got this guy to go with her back to her place and he thought he would get lucky until he realized that he was there for experimental purposes and she was having fun at his expense.
Lady Zora did not like how nasty this classmate was and she had to do something as she did not want to wait for someone else to come and take care of the problem. So the mistress used her chastity femdom to deal with the guy and it was by teasing him and getting him to wear a chastity ring and then hiding the key until he learned his lesson.