I would love to hear what y’all think about this story my sub is writing for me! 
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Honestly, I don't know where to start. This happened last Saturday. I was over at Mistress' place, she wanted me to try something new and called me over. It was crazy when I got there. She had people over, it was a party apparently, but not a regular party mind you, they were clearly a part of the dynamic. I was a bit nervous at first but then as I laid eyes on my beautiful Mistress it all went away. I asked her if this party was the surprise, she said that it was a part of the surprise but I had to wait a little longer for the actual thing. 

I've been to parties with her before and knew what to expect, she quickly ordered me to strip, right there, in front of everyone. I was a bit shocked at the sudden request but knew better than to argue with her. I undressed and nearly folded all my clothes and placed them on the counter. I was stark naked, on my knees, with my hands behind my back. The only thing I still had on was my chastity cage. It came off on special occasions only, I wondered if this was the time. 

She asked all her friends to gather around, it was very clear that there were slaves and Dommes here in this party. I got a little excited seeing all the leather clad Dominatrixes, which quickly went away thanks to my chastity cage. It was a little uncomfortable, but I'm quite used to it now. With all of them gathered around, slaves on the floor on their hands and knees while the Mistresses sat on the big white couch, Mistress announced what she had planned for today, she said that all the slaves would be tied up against the wall, uncaged, and made to cum, whoever would cum first would be the loser and will be in for quite a night. I was terrified to hear that, I hadn't cum in 4 months and if Mistress wanted to she could make me cum within a minute..
And so it started, all of us slaves were tied up and the Dommes started working on us. It was clear by the way Mistress was stroking me that she wanted me to lose and well I didn't disappoint. I was the first one to cum and it felt amazing to have cum after so long. Mistress wasn't mad at me but was somewhat excited, this confused and scared me. 

She laid out her plan for all of us, Mistress dragged a new contraption table like thing and wanted to try it out on me. I had to stay hard for that, which wouldn't be difficult but Mistress didn't want to take any chances and gave me 2 Viagras, she explained what her plan was while the drug  was kicking in. 

I was made to wear a tight black leather catsuit with my now hard and throbbing dick out of a slit around the crotch. Then I laid down on the table looking thing, my head and back were supported and I had to bend my knees to make sure I was able to put my dick in the hole on the centre of the table. Mistress also put a cock ring on me just to make sure. I was gonna be hard all night. 

Then the real "fun" began, she laid out all her cbt instruments, apparently I wasn't supposed to cum afterall and this was a punishment for that. I was scared but horny af at this moment.

Mistress gathered alll her friends around me and they started to tease me, my balls, hard throbbing dick. I even felt a lick or two. It felt so good, not what I was expecting at all. I was in pure bliss. But, then it happened. Mistress struck my balls with a paddle. More than a few times. It hurt real bad but was nothing compared to what was coming. 

Thanks to the pill and the cock ring I was still hard but it hurt like hell. Next came the cbt equipment lying all around me, neatly arranged. Everyone in the room was encouraged to come try them out. Mistress took the sounding device and lubed it up in KY jelly, it was a small piece of metal that would go up my urethra. It was shaped in a small bead like structure and felt funny moving. It was uncomfortable but I kinda enjoyed it. Someone even began fondling my balls and slapping them really hard at random intervals. It was so weird, pain then pleasure then pain, they both seemed to mix with each other and I was confused as to moan in lust or whimper in pain. 

Her friends quickly follow suit, they would fuck my penis with that metal rod, which felt like pure agony at that point and they would they the Torture my completely unobstructed cock and balls. They used a sharp needle roller thing on there, it didn't puncture skin but the needles dug deep, almost all of them hit my balls as well. It was definitely a night to remember. 
This went on for almost 1½ hours and by the end it hurt so much.