I can understand the appeal of having a dom controlled release while in bondage. When I was traveling a lot and visiting other studios, I noticed that most had Hitachi vibrators. So, it must not be uncommon. Having come into prodomming in Columbus, Ohio where adult businesses were under continual legal scrutiny, I had to operate on the side of caution, especially having other women on staff. In Rhode Island, anything was permitted. It was great to be able to incorporate strap on and gs play into sessions. But, for some reason, I was never asked for a dom controlled release. I wouldn't have minded with a vibrator and bondage as it seems a natural fit. Club Dom and Subby Hubby have a made forced orgasm videos. As I remember, they sold well.