Mistress Nica does not like it when anyone tries to mess with her stuff. That is what her ex was doing and she did not take it kindly. She had to show him that she was not the type of person to be taken for granted and that she would not take anything lying down. So she forced him to be her human pony and he had to carry her all over.
Mistress Nica caught this guy trying to steal from her. The mistress had to teach him a lesson no one had ever taught him before. She did this by turning him into a human horse and riding his back until he collapsed on the ground. She also whipped him to show him never to mess with her again. He never tried to steal from anyone after that punishment he got.