All characters in this story are over 18.
Sorry that it's fairly short. I hope you enjoy it though :)
*****
I unlocked my front door, waving my friends into my home. As they hung up their coats, I began to explain what I had in mind as entertainment tonight.
"So, I've built a machine that gives the user an increasing electric shock every second for as long as they can still hold onto two wires. When they let go of the wires the machine stops and your score is given, which is the number of seconds you managed to last."
"Ohh, that sounds interesting". One of the men, Charlie, winked at me.
Mike laughed. "Yeah, but what's the prize?"
"There isn't a prize, but the loser gets tied to it all night, naked." My pussy was getting wet from the thought, but I didn't show it. "Don't worry, I've set a cap on the current so it doesn't kill you."
"Wow. Alright.", Mike replied, "Don't you think that's a little severe?"
"It just adds to the fun", I laughed. "Alright, everybody to the basement!"
The 5 of us ran down the stairs, chatting to each other about the game I'd set up for them.
The people who hadn't spoken, Jane and Alice, were both much more shy than the rest of us, but they seemed eager to join in the fun too.
"Alright then, who's going first?"
Nobody responded, everyone wanting to see what it would be like before they had a go.
"I'll go first then, if you're all so shy about it!", I laughed. "Mike, can you close the door? I don't want the neighbours to get worried if they hear screams".
"Sure", he mumbled as he went to shut it.
"Great. Right, so, you simply hold on here and here, and then somebody presses that button over there to start. You don't need to stop it, I can let go of these myself when I want to." My body was trembling in anticipation of the pain, both wanting and not wanting it at the same time.
I gripped both the wires, hard, gritted my teeth and ...
"Go.", I growled.
The pain started out small, but it began to build fast. The intense voltage coursing through me made me spasm slightly, and I began to whimper. A look of concern could be seen on the others' faces. "It's fine" I said, gritting my teeth.
Counting the seconds in my head, I could feel my willpower slowly breaking as I gripped onto the wires with all my might, my hands turning pale. Amongst the pain though, there was a feeling of pleasure as I started shaking not only from the pain, but also from trying to release an orgasm I could feel building up inside of me. I couldn't touch my clit if I wanted to keep my hands on the wires, so I remained on edge for felt like forever before I managed to finally cum with a scream as the pleasure and pain both washed over me simultaneously. Still I kept hold of the threads of wire, basking in the mixture of pain and pleasure I was going through. Eventually it got to a point where I was shaking so uncontrollably that my left hand involuntarily let go of the wire and the connection was broken, my exhausted, shaking body drenched in sweat crumpling to the floor.
Looking up with a smile, I marvelled at the look of horror on their faces.