Mistress Gaia wanted this guy to wear a chastity device but she was afraid that he would not do it until he felt threatened or scared. So she facesat on him to make sure he felt scared. And it was after that that she asked him to wear the chastity device and he wore it without asking any questions or even hesitation. She knew that her cruel facesitting had worked.
Mistress Gaia does not like to use things on her man unless she is sure they will work as well as she wants them to. And that is why today the mistress tried this chastity device on this loser before she took it to her man. She wanted her man to be tamed sexually and chastity humiliation was the best way to do it. However, she had to test it on someone else first to test its efficacy.
Mistress Gaia did not want her slave to be a pervert. So she did what she considered to be the perfect way to control him. She went ahead to dominate him by asking him to wear a chastity device. He did not like it but he had no choice. He did what the mistress wanted but he found himself locked out of touching his dick and doing anything meaningful with it as she had hidden the chastity key.