Not always do we have the time or capacity to assign a trainer to each trainee for every session. Sometimes we must rely on more archaic methods like metal frames and machinery to assist our training sessions, such as the good old doggy trainer. The frame consists of simple metal bars, to which the trainees' ankles, wrists and neck are restrained – preventing the trainee from getting up or changing position. Once the trainee is strapped down, a large toy is inserted from behind, essentially locking them in place. The combination of the raised neck restrains as well as the toy holding their ass up essentially causes the trainees to have a perfectly arched back. Of course we expect our trainees to hold their posture even during the strongest shaking orgasms, so we usually set the toy to its highest setting and leave the trainees strapped to the trainer for a few hours or overnight, giving them countless orgasms and lots of time to adjust to this pose~