Hi There,
Haven't used it during the actual act but I have used both TENS and a violet wand as foreplay.
If either of you are into sensation play whatsoever it's a fun thing to try. TENS can be picked up pretty cheaply although I've found that the more expensive ones do give you more bang for your buck. Turned up to high though and they can actually be painful.
Violet wands are WAYYY expensive but very yummy in that tingly all over way. They work on static electricity and the tingles are mmmmm, very nice, especially when you charge yourself up (so to speak) and the touch your partner. See if you can borrow this equipment from a friend (although if you had a friend with this equipment you might not be posting here).
There is a book called "Juice: Electricity for Pleasure and Pain" by Uncle Abdul which I'd recommend if you do decide to start playing with electro toys.
Good luck, have fun, be safe
