For those who wish control and train children, this is a major bonus. If they do something you don't like, you cause them pain. If they continue to do it, you make the pain more severe until eventually they get the message.
Sounds a simple enough practise, parents have been using this tactic for years. A good smack and the child should learn never to do that again. But what if you want to teach the child something way more sinister. What if you want to make it very clear to the child that no matter what happens , they are NEVER to speak about what is happening to them, What if you want to convince a child of a lie that they are not accepting. What if you want to teach them that resisting rape will incur serious consequences. What if you are trying to program a child's brain into behaving a particular way at a set time.
Basically what if you want control over this child, One very effective mechanism is electrocution. It is easy to access, can leave few marks, and with a little knowhow can be rigged up to give only the exact amount required to get the point through to the child.
There is book I am in the process of reading called 'The Body Remembers'. It speaks about how the body holds a memory of the trauma it has been through. Much like how someone who has been through physical abuse will flinch when someone raises their hand near them.
We know we have been electrocuted, our body randomly jolts, not uncommon to movements many make when relaxed. But the other day we relived a full body electrocution. We were lying on the couch watching TV, something must have triggered it. Our muscles tensed, tighter and tighter until our body was arched back in a tight and tense arc, shaking. While I couldn't feel the pain (that has obviously been stored in another part of our memory) I could not escape this feeling, My mind was clear I knew what it was, but my body was working on its own, It lasted for maybe 15 seconds, I don't remember exactly, and then our body relaxed back to its normal state. At that point I knew for sure that what I suspected was true. They had used electrocution on us.