Someone who gets off on using
electricity for
sexual purposes -- this can either by by using it for its
work potential (
vibrators,
fucking machines), or by directly using it to stimulate the
nervous system.
There are two main classes of sex toys that directly apply electricity. The first is akin to a TENS unit, which is a battery-operated device that is used in chiropractic science to prevent muscles from cramping up -- many of these devices are used in places other than where they're intended. The other class is a low-power Tesla coil, called a violet wand. This is a Tesla coil that is rigged (usually) to a glass bulb. (Kinda like a lightning ball, but at a higher power output.)
When playing with electricity in a sexual passtime, there are some important safety tips to be aware of -- otherwise, it may be necessary to call the paramedics. These are: 1) Don't use high amperage anywhere on the body, and 2) Don't put the path of the electricity directly across the brain or the heart. The first rule is because it creates a severe amount of stress on the system, and can burn out the nerves in that area. The second rule is because those two areas can cause more harm, more quickly, if they're shut down. (The heart operates on the body's own internal pacemaker, which will shut down when it's subjected to large voltages. The brain operates, essentially, on chemical electricity, and since it's the central repository for all nervous activity in the body, it's a very bad thing to overload.)
With violet wands, just be aware that the violet wavelength light that is produced also has ultraviolet components, and can thus cause sunburn. Again, you should not place it directly over the heart, but that's just because you have to be paranoid to stay alive.
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