You have described it perfectly. That mind blowing intensity of desire, crave, frustration, denial, longing, helplessness, ......heaven and paradise. The Master has to have a perfect understanding. I personally love nipple torture too so that combination of cock, balls and nipples is a dream come true.
Yes, he very patiently and skillfully increased the intensity of the stimulation both with his hands and the electro until his subject was frantic. His subject's mind dissolved in a wash of desire for release until he submitted completely to his master's control. Since he was gagged and tightly bound, his only means of communicating was by thrusting his hips, begging for his master's touch. But when that touch came, it was only to edge him and further increase his frustration. Kudos to the master for a job well done.