This mistress wanted to degrade and dominate this loser because he was obsessed with her. She did not want anyone to be obsessed with her so she used her trampling fetish to deal with him. The mistress stomped on him and she pinched his nipples as well to add on to the pain he felt. The guy had to promise her that he would stop being obsessed with her before she let him go.
This guy thought that just because he had a big dick, this mistress would be turned on and excited when he showed it to her. She did not even know him and she felt like he was a pervert and so she punished him for it. The punishment involved crushing and trampling his dick using her sneakers to make him feel pain and never do anything like that ever again. She also crushed his balls.
This mistress was ready for war. This guy had pissed her off badly and she had to react to what he did. She chose to teach him that she was not as weak as he seemed to think she was. And to make sure he learned his lesson, the mistress chose to trample him and crush him all over his body from head to toe. He regretted why he did it.