Electricity

Hey E/everyone,
I have another pretty simple question. I've been doing some reading/watching some videos this weekend and noticed some scenes where the Dom uses a stick like thing on the sub. It looks like an electric fire starter thing. What does it do?

Also, in another scene, I noticed the Dom's use of electical stimulators internally on a sub. Is it related to a TENS unit or something completely different? Is the effect a zap or more contraction of the muscle?

Thanks for your help,
minihaha

The TENs machine I have had used on me contracts the muscles more than zaps...

I suspect the first device you are referring to is what you say it looks like - a spark generator for lighting gas. A fairly safeish method of getting a sudden, sharp zap when used near flesh but unlikely to cause harm.

It is probably violet wand. Tesla coil type device.