I have received several PMs with about the same questions. I thought I would post my reply for all:
How to make the naughty electrons pulse the prostate:
I don't know that I have actually felt pulses through my prostate. Mainly what has happened is the anal device has pushed against the prostate during anal contractions. The e-stim box ($20)causes the anal muscles to contract in rhythm and intensity of the mp3 file I use.
For example my anerios stimulator feels great if It is rubbed against the prostate. Then I added electric contact points to make it a bi-polar (two wires)electrode. (See my photo gallery for a pix.) This really gave the "relax & let the e-box do the work" feelings.
Now when I connect it to my e-box with a good file that causes the anal muscles to contract and release randomly I can feel the prostate being massaged. One channel is for the cock head and base or balls and the other channel connects to one of my anal trodes. If I can keep my hands off my dick I usually have a nice cum.
If you have a favorite dildo (hard plastic is the best) you can make it an electrode by using self stick copper foil from a stain-glass or hobby store. The large roll of foil is usually only 10 bucks or so. Apply the foil down one side and then the other side for a bi-polar electrode. Rub out any ripples using a round plastic tube like a ball point pen on edge. Then use fingernail polish on the very edge of the foil to be sure there are no sharp edges. I usually use 2-3 coats and let dry overnight. You can also use the fingernail polish to insulate parts that you don't want to electrify such as the very base or half way up the toy.
Take a stripped wire and attach to the raw foil at the bottom for a good electrical connection then coat with polish to secure and insulate. do this for each side. The next day you are ready to ride your new toy.
The good part is if you need to change the foil or make it larger or smaller, simply use fingernail polish remover to remove, clean and make it ready for another try. Mistakes are easily corrected.
I also make my own anal toys out of wood and aluminum on my lathes. Even the aluminum ones, I use polish to insulate, then I like to have the copper foil as the actual electrode. The wooden ones are turned on the lathe in odd shapes, sanded and coated with clear epoxy and then the foil is applied and connected. These also work well for the ladies as I can offer many different shapes & sizes with the electrode being near the opening or farther inside the pussy. Then an additional clit trode. Ladies usually like a smooth ride (mp3 file). Plus the wooded ones look cool and inviting.