Lock Up That Limp Dick

One of my dreams comes true when I am invited by a dirty slut to a gangbang. I arrive on time and find myself in a large room with about a dozen other men. A gorgeous woman enters the room wearing heels and lingerie and orders us all to take our clothes off which we obey. As she gets herself ready chatting to some of the men I try to get my mind on the game by wagging my penis up and down. Soon all the other men have hard ons and gently masturbate to keep themselves simmering. We are told to line up to get ready to fuck the Goddess. She starts sucking off some of the guys as they jostle to get into the action. I'm still struggling to get erect which I can't understand since I am bisexual with a beautiful woman and lots of hard cocks around me. She works her way round the group and it finally comes to my turn. She immediately notices my flaccid dick and I hope she will help me. To my shock she looks me dead in the eye, laughs and shouts "Oh my god, I've invited a limp dicked wanker to my gangbang!" All the men start laughing at me which makes my dick shrivel even more. She then cruelly says "I can't even call him a gay faggot because he can't even get hard with naked men around him" to which the men laugh and join in making derisive comments. I'm appalled at how I've now become centre of attention. The Goddess giggles excitedly and says "I know what I've got for you!" and she goes to her handbag and takes out a steel chastity device with key and lock. She says "This is what limp dicked pricks like you need to wear so put it on, NOW! If you don't I'll get all these men to beat you up, you fucking loser". I shamefully withdraw from the group to get on with my task as Goddess resumes playing and sucking with 'real' men. Oddly I find myself very slightly aroused by this so I struggle to squeeze my penis into the cage so have to crush my balls in pain to make my cock a bit smaller. I finally get a snug fit and with the small padlock in my hand go over to watch the group. The Goddess is getting well serviced by her men she soon notices I've come back. She orders "Come here useless!" and as I stand before her she asks for the lock. As she secures the padlock onto my cage she slaps my face and declares "Since you can't give me what I want, you will now have to pay me every month to have your tiny prick unlocked for a short time." All the men guffaw with laughter as she tells me to stand back a little, turn around and bend over. She wipes a little lube between my bum cheeks and says "If anyone needs another hole to relieve themselves, help yourself. Since a number of the men are bisexual, needless to say I went home with a lot of cum deposited in my arse. With that psychological trauma, from then on my life completely changed and I could no longer ever get erect and continued to be a chastity slave to that Goddess. She encouraged me to get sexual pleasure via the anus by using toys or real cocks to stimulate my prostate and gain orgasms that way. Though thoroughly ashamed I was ultimately appreciative of her help. S x