Trying a new setup and ended up hard stimming my dick to cumming

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I started out with 1 stereo stim box, Channel A on the head of my dick and Channel B around my cock and balls and a probe in my ass. It was working pretty well but I also had an audio splitter and my 2B with me so part way through the session I added the 2B in triphase. I slid the stereo stim down lower on my shaft and added the 2 channels from the 2B to the tip of my dick and the common to my balls. OMG! It was intense and I couldn't hold out too long after that. I'll upload soon with doing this from the start.

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