Mistress Alexandra wanted this girl to realize that having a bad attitude was something that was going to cost him a lot. And hence she used her whips to punish him and make him realize that if he ever pissed her off, he would have himself to blame for what happened. That is how the mistress made him change from having a bad attitude to having a good one in no time.
This guy was totally fake and he preached what he did not do. He acted as if he was one thing when in reality, he was something totally different. That did not amuse this mistress and she used her whipping fetish to dominate him. The whips were painful but they made the guy realize that it was easier to be himself and stop being fake. That is how he changed.
Mistress Alexandra paid this guy to work for her but he was not good at his job and she did not like it. She had to punish him and she made sure the punishment was worth it. He was whipped while naked because the mistress felt that that was the best way for him to feel the pain of what she wanted to do to him. The mistress was satisfied with what she saw and knew there would be improvements.