Before his accident, Fred Smith had been a mostly unfit young man with a healthy sexual appetite. Although his sexual contacts had been few and far between, he was a confident heterosexual and a great admirer of the female form.
He'd had a long look at the prosthetic body that he was going to be occupying, and he'd approved. It appeared fit and healthy, with a pleasing athletic shape and just enough of his original physical features to allow him to believe that it was his new "self." When the bio-pod that contained his brain was placed into the main trunk of that body, he took some time to admire his much-improved proportions, and he was certain that, after some time to adjust, he'd be having an improved sex life.
Now he watched in terror from his still-limbless body as his male nurse knelt under him, slowly stroking a throbbing eight-inch cock and looking down at him with a combination of lust and hunger.
There was a computer in his bio-pod that allowed Fred to interface wirelessly with local computer networks and to slip into a virtual reality to avoid sensations from his body, in case of emergency. Steve, his nurse, had over-ridden that computer's connections, leaving Fred trapped and unable to call for help. Steve had already demonstrated that he had a mastery over the simulated sexual responses of Fred's new body by forcing him to ejaculate twice, now... once through a prostate massage and oral stimulation so powerful to Fred's enhanced nervous system that it had almost driven Fred mad with the overly-intense pleasure of it.
He was helpless and at the mercy of a sexual predator. He didn't know when someone else from the hospital or even a random visitor would come by so he could yell for help; his only hope was to ride out the experience and pray his intellect survived it.
Steve scooted forward on the bed until his scrotum rested gently against Fred's, and continued to stroke his own cock. The soft contact of the intimate skin and the gentle motions brought a fresh wave of pleasant tingles to Fred's groin, and his cyber-cock started to rise once again.
"You don't have a sacral nerve cluster anymore," said Steve, as he watched the synthetic dick start to swell for the third time in less than an hour. "Just a very fast processor with a lot of RAM, packed with firmware that allows it to simulate the neural transmission of a sacral nerve cluster. Want to know why that's awesome?"
"Uh, sure," said Fred. He'd tried asking Steve to stop this sexual assault; he'd moved to begging and pleading, but the maniacal nurse seemed determined to take his sadistic pleasure from controlling Fred's repeated orgasms. Playing along was the only strategy left.
"In an organic male, the sacral nerve cluster fires off all of its neurotransmitters when you cum," said Steve. He released his cock, then scooped up Fred's semi-erection and held it against his own. The contact of the underside of Fred's cock to the underside of Steve's was another wave of pleasurable sensation, and Fred moaned lightly as Steve wrapped his soft fingers around both cocks and stroked them together.
"It takes a while for the sacral nerves to rebuild their supply of neurotransmitters, so they can start firing again. That's why, usually, it takes quite a while before you can get hard and engage in sexual activity again. Well, your mileage may vary, I suppose."
His stroking of their cocks was slow and sensual, stimulating Fred's biomechanical cock in all new ways. It rose to full prominence and began to throb against Steve's hardness, and the nurse groaned and increased the speed of the stroking a little bit.
"You, with your sacral processor? It doesn't take a computer any time at all to send a new set of signals up the leads to your brain. You don't have any refractory period... once you cum, you can cum again right away, if you get the right stimulation."
"Jesus," hissed Fred, as Steve's grip on their cocks tightened a little. It felt amazing, but it was the furthest thing from what Fred wanted. The information would be great to have, eventually, but he didn't want to be having sexual contact with another man, he didn't want another orgasm at the moment, and he didn't want to be the helpless toy if this maniac. His mind was conflicted and raging with emotion, but his cock was VERY hard.
"You could have opted for a bigger cock, you know," said Steve, as he looked down and compared their lengths. "I have a couple of inches on you, here, even if you're almost twice as wide as me. That's ok. Some people prefer wide. But if you ever want to, you can get this upgraded. I've seen them go as long as ten inches; anything more than that, and there's a big risk to any potential partners. Your cock is steel on the inside. It feels like it, too."