TENS Machine

I spent a while working out how to set it up so I would cum, here is everything you would want to know.
Putting the electrodes on the right area is vital, I tried both on my cock, felt good but I didn't cum.
One on my balls one on my cock, again if felt good but no ejaculation.
I put one between my ass and my balls and the other on my cock, getting closer but no cum.
One on my lower back just above my ass, one on my cock, this was the closest so far.
I discovered that if the red electrode goes on the cock and the black on my lower back the sensation is towards the lower back so I switched them round, Black at the Back, Red on Penis head and WoW, I came loads, next day I tried again and turned up the power, that felt good but I could tell I wasn't going to have a handsfree cum,
get the setting right, play around until it feels really nice and wait.
I now know where to set the power levels and I can control the time it takes to get off, the feeling if you get it right is like those few seconds before you cum when its building up but done right you can hold that feeling for as long as you want, I usually stay at that level for 40 minutes before just increasing the level a tiny bit, I have amazing orgasms, I think in the hands of an expert who knows what to do it would be imposible not to make someone cum ,its imposible not to get an erection if used just right
I also should say that even a few minutes after cumming if I switch it back on I get a hard on well before I would usually, I have put it on and cum and then fought through the refraction pain and got hard and ejaculated again.
I'm uploading a short video showing how it got me erect, I t would have shown me cumming but the window cleaner called.