Males owned by women as pets are still occasionally permitted to masturbate. After all girls like Lady Edyn and Princess Miranda know that men are not only slaves to women, but also slaves to their cock that they need to constantly stroke. So this activity is still permitted, it's just been improved by the ladies, modernized if you will. He can stroke as much as he likes when permitted but his cock will also be randomly electrocuted by the girls for their amusement. It makes masturbation both infinitely more difficult for him, and so much more fun for the ladies.