More great ideas! And I think what you're thinking of was me, but probably when I had a sub on his knees leaning forward over a chair, with his arms behind him locked in. I've also had a sub standing against the bondage wall, with his arms up over him and wrists going back into the holes of the stocks. Maybe you're thinking of one of those? I also like your idea of electro on a random timer. Maybe the vibrating wand also on a random timer? I had a sub tied spread eagle on the bed once, facing up, vibrating wand hanging over his dick from above. I told him he was allowed to cum only within the first 30 seconds (if I recall correctly) after the wand turned on each time. But I had it set to turn on and off at seemingly random intervals. One minute on, five minutes off, three minutes on, two minutes off, etc. He was also blindfolded, and there was no clock in sight anyway even if he wasn't, so he had to play it safe and make sure he didn't cum if it even seemed like his allowed time may have expired already. But then if he was really close and thought he better not cum because his time to do so may have expired, he would be right on the edge for the rest of the time, without even knowing how much time was remaining before the wand turned off again. *evil grin!* Maybe I should rig something similar with the sub in the stocks? Thoughts?