I have to admit that I have not had much luck stimming with a cage. I tried the plastic cage with the built in custom pads. I found the pads resulted in a painful stinging sensation and not very pleasant. I received the another metal cage with a urethral insert. It has spikes on the base cock ring and these interfered with my cock being able to go up and down the insert as I gained and loss an erection. As I would start to gain an erection, by cock would catch on the spikes and remain trapped. Also, as I tried to use it as an electrode, too much sensation would be delivered to my balls through the main large ring and the base cock ring. I made alterations. I knocked off the spikes and filed down the edges. Then I used electrical tape to mask the first two rings. This left the secondary ring and urethral tube as electrode surfaces. It worked better and my driver was able to make me cum with it on. I still like the plastic cage. Its fun to wear. I am wearing it right now. I