When I was around 17 I discovered e-stim by accident...This was before I even heard the word e-stim.
I was messing around with my stereo system, this is back when a stereo was made of different components. You had a tape deck component, an equalizer, and a Tuner with it's own built in amplifier... These stereo systems also had large speakers that required 100watt amplifiers to work. These speakers had wires that ran into them, you know the type with the RED and BLACK things in the back that you push down on and insert the exposed wire into the hole...
Well, I had my system turned on and the volume was fairly high and I was messing around with these Red and Black wires that went into the back of one of my speakers when I accidentally touched the wires to my finger.... I received a very MILD electric shock... Not a shock like you get from a house current but a very MILD electric sensation... Hmmmmmm I thought... It was like a light went off inside my head... I held the wires against my finger and then I turned up the volume... The sensation became stronger but still was not painful at all, more like a mild stimulating pulsing effect. It was very interesting...
I began to experiment with the way this worked and I figured out that the Amplifier of a Stereo System will put out a low level electrical current that is the electric signal that powers the speaker. I discovered that the music you play will relate to the sensations you feel from the wires...
The best sensation was from static on a radio station with no music, just static between stations. You need to be very careful not to let the Red or Black wire touch each other or you will short out your amp. I would wrap one of the wires around the head of my penis crossing over the tip and then around the ridge under the penis head. The other wire went about 2 inches lower on the shaft of my penis. I used Vaseline as a conductive lubricant. Then I would slowly increase the volume on the stereo until I began to feel a current flow into my penis.
I will mention that this could be VERY DANGEROUS if you don't know exactly what you are doing... It would probably be better to buy today's SAFE equipment for e-stim if you can get it...