Mistress Gaia felt like degrading someone and the easiest person for her to degrade was this guy. She invited him to her house and she had him think that they were going to have fun. And as he came, her girlfriend also came to visit and so the two of them had fun torturing the guy and turning him into a human pony and riding his back until it nearly broke.
Lady Scarlet felt that this guy had to be scared shitless and that is why she used her pony play fetish to deal with him. The mistress was sure that the best way to deal with him was to make him feel pain and be humiliated at the same time. That is why pony play was her preferred mode of punishment. The pony play punishment worked the way it was intended.
Mistress Gaia did not want to deal with a malicious person and when this guy turned out to be one, she felt that she was not in the mood to deal with him and she had to humiliate as well as dominate him so that he learned never to be malicious ever again. That is why she made sure she turned him into a human pony and rode him to both humiliate him and to make him feel pain.
Mistress Celine was pissed off by her slave and she chose to overlook it. But then he did it again and again and this time she could not look aside. She went ahead to change tact and turned the guy into a human pony. He was humiliated but that was not enough for her. Instead, the mistress chose to trample the shit out of him and also choke him as well.
When this mistress had her friends over to her house for a sleepover, they knew it was going to be fun even though they did not know what she had in store for them. They knew she was adventurous and fun and she did not disappoint. The mistress had a human pony for them and they had fun riding it and trying all manner of things on it. It was fun for them but not for him.
Mistress Anna had had enough of her ex and she did not want him bothering her anymore and so she did what she does best and dominated him to get him to learn that she was not interested in him. He had to stop bothering her and he did after she whipped him and rode his back as a human pony. The pain he felt made him learn his place.
This guy tried to please these mistresses but he ended up coming across as an ass licker and a sissy than the stud he wanted to appear to be. The mistress had fun at his expense and they enjoyed riding him as a human pony. He carried them all over the house and he nearly collapsed as they did not care what he felt as he carried them. His only warning was that he should not fall down.