How kinky you want it, miss?
Well as with everything even fetish sex is subject to the laws of diminishing returns. What was new becomes old, times change. If you feel like you want to try something a bit kinkier than usually, try creating your own electrifying sex session. Yes that was a poor attempt at humor, but in all seriousness, people get freaked out by the concept of electrosex.
We are taught from an early age, electric and playing with it are bad things. But being the weird kid on the block I ended up trying to electrocute my cock in the hope it would bring more pleasure (see how I can pervert even the most innocent electric Lego train track set!) I just liked the involuntary twitches it would cause. Obviously, older and perhaps a little wiser, I wouldn’t suggest anyone races out and buys a Lego train set to get their freak on with their partners. Try this instead !
Electricity can be used to induce pleasurable stimulating effects or painful ones, pain and pleasure, as usual, extricably interlinked. Yes electricity can be dangerous.
A little physics. It’s not the voltage that does the damage to someone, it’s the ampage. Amps are a measure of the force with which the electricity is pushed around its circuit, be that a wire or a body. An example of this is when you watch TV and you see someone Tazar someone, it doesn’t kill them because it uses a high voltage but a low ampage. In the wrong conditions, a single amp can be enough to kill. Never pass any electric from one side of the chest to the other, ever. It may look a sexy idea, but it’s a chance you just don’t want to take.
If you want to be safe, the best thing to do is keep the voltage below the chest. So that means you get to be nasty to genitals - male and female, anus, or even genital to anus, if u really want some electro “stimulation” 
Obviously this isn’t the area for home made toys, but toys can be purchased
inexpensively from here. I would also recommend you get a book,written by a professional that goes into a lot more details on electro sex than I can.
Having said that though, there are plenty of devices that with a bit of safety can be played with and not only cause stimulation but also look kinda interesting, items such as magic wand style devices can be played with, without having to worry about problems and are pretty damn safe, if used properly.