Having experienced the brutal machine that my master had made and installed in his dungeon, I willingly accepted his invitation for a second visit to try out some modifications that he has made over the past few weeks, On arrival at his house I noticed quite a few cars in his drive and guessed that our session might have a bigger audience than the first time, a thought that excited me greatly. master greeted me and showed me into his front room and introduced me to his friends, 6 guys and 3 ladies all of various ages ranging from late 30,s to early 60,s at a guess, after a brief chat and master explaining to us all that since my last visit the destroyer had gone through some major upgrades that he would demonstrate today, he instructed me to undress in front of everyone, once nude he led me and the others to his dungeon room, I noticed that the stocks had some padding around the neck and wrist holes for extra comfort and that the beast had some additional rods and wires etc, and that the dildo was now what appeared to be metal at the tip and more metal half way down its shaft. master gestured for me to get onto the machine and strapped me in, this time there was also a support bar that went under my middle to ensure my bum stayed up as high as possible, the audience had by now taken their seats and watched as he began attaching things to me, firstly he put a strap around my cock and balls that was linked to the apparatus in some way and then slid a flexible sound into my urethra, the penny then dropped, he must have added some sort of electro devise to the destroyer, he then positioned the dildo tip so that it was just nudging my already lubed hole, and began explaining to the onlookers that he had added a dual circuit E shock extra, one circuit would go between my penis and my balls , the other through the metal tip and ring on the dildo with variable pulse rates and power levels, also that the strap around my genitals was fixed to a second crank that would tug my cock and balls as the beast banged into me, this all sounded a bit scary but I was keen to see what it all felt like. master then dimmed the lights to red and informed me that testing would begin and was I ready, I said yes. As every thing behind me was turned on and adjusted he gave a running commentary as to what was being tested first, I heard the clicking of switches and master say, first we will activate number one circuit, I felt a funny tingling sensation in my cock and balls that almost tickled until he turned up the power and selected different pulse rates, the feeling was intense and weird but after a bit of adjustment he hit the spot with matched power and pulse and I came uncontrollably spewing semen out around the electrode that was inside my cock, he then activated the beast and the dildo started to slowly enter me, in and out getting deeper and deeper, half way in he stopped it inside me and told the crowd that number 2 circuit was being activated, again a tingle in my bum was followed by an assortment of pulses and power until my ass muscles were clenching and releasing at an incredible rate as were my thigh muscles, Oh my god , the feeling was nearly making me scream with waves of pain and pleasure, soon the genital puller was also turned on, and then the destroyer started thrusting into me, I was borderline delirious now, my scrotum was being tugged and electric shocked, my bum hole was being pounded slowly and e,shocked also, master continued to explain to all how it all worked as he gradually increased speed , pulse and power levels on everything, I was in such a state of arousal that I was farting , urinating and ejaculating uncontrollably, tears were rolling down my cheeks and I dribbling in ecstasy, finally I shouted stop as I was on the verge of passing out, master turned everything off, but the dildo came to rest fully inserted in my ass, I was blubbering and whimpering, covered in sweat and still oozing cum from still throbbing penis. master then turned up the lights and invited his guests to come and inspect the equipment and their demo, subject (me) in a total state of humiliation , thinking that it was all over I let out a big sigh and also a lot of air and lube from my bum and relaxed as best I could with them all around me touching me discussing the demo, so far, when master said there was one more thing for them to see, he changed over some wires and told them that now the electric circuit would go between my penis and my anus, and that it should make me jolt , jerk and most likely cum again, I braced myself for this final test, they all stayed nearby and watched as he energised the machine once more, as the power increased I was writhing with weird pleasure as shocks pulsed my penis through my prostate into my bum, I heard the rustling of clothes and zippers being undone and knew what was going to happen next, one of the females asked master if could turn everything back onto half power while she watched her husband face fuck me, before he could answer I shouted yes ! and on went the destroyer, pounding, pulling and shocking my nether regions while each of the guys took turns in my mouth, the ladies all touching and rubbing me as their partners ejaculated deep in my throat, when they had finished master removed all my attachments and just left me strapped there awash with sweat and spunk and my ass gaping, the next thing I knew was feeling fingers in my bum working it and adding more, one of the guys called his partner a dirty cow as she began fisting my stretched hole, all of the guests were now behind me watching as the woman kept fisting me and adding fingers from her other hand, before long I could tell that she had got both her hands up to her wrists in my ass hole, twisting and pushing right in, I could say or do nothing as master was now in front of me with his huge cock in my mouth shooting his load down my neck, after much more fisting and face fucking by god knows who , they finally all left and master released me from the machine, I could hardly stand or walk but managed to dress and leave, The days events left me totally exhausted and rather sore, but wow what an experience, a voyage to the depths of depravity indeed.