The Donation

Mike glanced at the monitor and noticed his numbers slowly ticking up again and smiled. He also noticed Alicia was no long on the screen.

"Water?" She asked as her head popped up next to him smiling, "Sorry if I startled you."

The suction on Mike's cock increased exponentially.

Mike winced at the sudden pleasure and Alicia's eyes narrowed in a knowing grin.

"It's important to stay hydrated," she said as she moved the water over to him.

"Thanks," he managed to get out as the suction pulled at his cock, this time both deeply and rapidly. Mike reached for the water shakily. When he made contact with it, he also gripped one of Alicia's fingers. She didn't pull back.

Mike made eye contact with her just as the finger like devices at his balls pushed inward applying pressure to his taint. He felt himself almost cum again as he looked into Alicia's deep brown eyes. The machines menstruation's dropped to near zero as his stiff cock dribbled pre-cum into it's hungry receptacle.

"Nice job!" Alicia beamed glancing at the screen, "you are doing great."

She withdrew her hand and went back to her seat underneath the table. Mike blinked as he came back down off the edge.

"For real though," her voice came back on through the monitor, "drink the water. No joking about staying hydrated. You will last longer."

Mike nodded and unscrewed the cap. He got about halfway through the bottle when he felt the fingers drawing figure eights through his balls. The fingers had also started vibrating sending pleasurable sensations through his entire scrotum.

The cylinder on his cock had also changed tactics. A ring inside the tube slipped just under his cock head. It had somehow expanded so that it isolated the head of his cock from the rest of the cylinder. He could now only feel the vacuum being pulled on his sensitive glans and frenulum, while the rest of his shaft remained unmolested. As the suction magnified, to do the blood flow to the head of his cock. It turned a deeper shade of purple with each slow pulse. As Mike's pleasure built however, the pulses slowed.

"The AI is starting to anticipate your climax," Alicia explained over the monitor, "it's learning your particular brain wave patterns. We've found if we can slowly bring you to the edge of climax your body will produce more pre-seminole fluid."

Mike glanced on the screen and noticed his numbers slowly ticking upward again.

"As the AI tunes it's algorithms," she continued, "your edges will get longer and likely more intense."

Mike felt the ring around the underside of his cock head constrict small amount, unsealing itself from the wall of the tube. It was just enough allow the vacuum to pass through to the rest of the cylinder. At the same time the machine began to alternate between blowing air into the cylinder, and sucking it out again. The rush of air fluttered along the edges of his glans. Mike groaned in response to the new stimuli. This time, due to the unnatural sensation, it was a creeping build up. The machine altered its pace perfectly holding him hostage in a state of pre-orgasmic bliss.

Underneath him, Alicia studied the various screens and graphs which displayed heart rate, respiratory rate, brain activity, and the all important collection volume.

"You are really starting to produce now," she spoke into the microphone, "the AI has got your patterns modeled perfectly. Mike only grunted in response. She watched his face in a separate monitor. His eyes were closed and his mouth was open, breathing heavily. She couldn't help but feel turned on as she glanced up at his dangling member, held captive by the extraction tube. It's crystal clear design allowed her to see ever bulging vein in exquisite detail. His engorged cock head, now a beautiful shade of purple, ached for relief. She smiled to herself knowing it would receive none.

The machine finally relented. It had kept Mike on the edge for what seemed like three lifetimes. Just when he felt the familiar stirring in the base of his cock, the ring relaxed it's grip on his cock head. The numbers on the screen continued to tick upward as the pressure subsided. His cock however, remained erect and straining for release. Mike had never been this close to cumming and not been able to. He felt that any slight touch would send him over the edge and he bucked his hips to try to get that last bit of stimulation.

At that moment he felt three cloth straps tighten across his waist and thighs.

"This is for your own good," Alicia whispered in his ear. Mike turned his head and found her next to him pulling the final strap taught.

"You don't want to accidentally climax,' she explained, "sometimes the body reacts reflexively. This will help make sure you donate what you intend."

"Ok," Mike said as he reached for his water.

"You are doing great, by the way," Alicia moved to re-tighten the strap across his waist, "most guys use their safe word by now."

She leaned in close to him to check the neural net over his head.

"I think you could get the record," she whispered as she licked his ear before retreating back under the table. Mike's cock twitched in response and his donation numbers rose again.

Mike had never felt this way before. His body was on edge and his nerves on fire. The machine, save for the occasional vacuum pulse, lay mostly dormant. Mike's cock however was still rock hard. He watched as Alicia poked at a screen below him. Although her body was fully covered in a loose lab coat, every curve of her face and shoulders begged for him to touch her. In his mind he envisioned splashing milky white ropes of cum across her face and into her hair. His thoughts were consumed with lust.

The machine came to life yet again. The incessant suction stopped but it was now rolling the ring up and down his shaft. His engorged purple cock head, which had received all of the attention before, was now largely ignored. The silicone ring glided up and down his length at a slow, steady pace.

The contraption on Mike's testicles had also withdrawn its massaging fingers and replaced them with what felt like two separate rings. Each ring lassoed itself around one of Mike's balls. The rings gently pulled in opposite directions, separating and lifting his testicles apart. This tugging was just hard enough to straddle the pleasure and pain line.

The ring over Mike's cock continued it's path along his length. He could feel the ring getting incrementally tighter. The squeezing, upward stroke, forced even more blood to his oversensitive head which was still receiving no stimulation. Alicia, being close enough to the tube, tried not to stare but failed miserably. The bulging head had swollen so big and so purple that it dominated the scene. She wiped away a spot of drool that had formed at the corner of her mouth and forced herself to look away. She could not be caught looking so unprofessional. Dr. Swan, like any good researcher, had cameras at every angle for detailed documentation.

The resolution on Mike's monitor wasn't good enough to see exactly what Alicia was doing, but even if it had, he wasn't paying attention. He was in the thrall of the machine. His need to cum had never been so great. All he wanted was release. If his cock head would be touched, even a little, it would be enough to send him over the edge. He was continually denied. Instead the ring's assault on his shaft continued its slow, methodical constrictions. His cock dribbled pre-cum out of the tip as he was brought, once again, to the point of orgasm. As he rode the edge the ring slowly crawled across his length, stimulating him just enough to hold him on the brink. Mike strained at his bonds maddeningly trying to thrust but it was pointless. The machine had locked into him and was not letting him off the edge this time.

In a moment of lucidity the safe word flashed in his brain. He glanced at the numbers on the screen. No, he could endure a little longer.

As this thought crossed his mind, the device on his cock finally relaxed. The ring loosened and paused at the base of his cock. The opposing tugs on his testicles also stopped, however they did not release completely, and his balls were still held apart. His cock quivered in the tube as bead after bead of pre-cum oozed from his tip, which was quickly whisked away.

Eventually his breathing slowed and the blood pounding in his cock finally subsided.

"How are you doing up there?"Alicia asked through the monitor.

"I think I'm ok," Mike replied, but he wasn't exactly. He wanted to describe to her how extremely oversexed he felt. How he would stuff his cock in just about anything right now to get release. He wanted to tell her that just by looking at her face on the screen made him want to drive himself past her lips. How he wanted to fill her entire throat with his cock until she gagged on his cum. He wanted to pump into her until her mouth overflowed. He would unload onto her face until her sparkling eyes were bathed in his cum and her hair matted down white. He wanted to tell her all this, but didn't.

"I've never felt like this before," was the compromise his cock made with his mind.

"Completely understandable," she smiled knowingly, "and completely normal. Most people have never gone through extended periods of denial like this, but it is completely safe. Just remember your body is not in any real danger of harm."

Although that knowledge was comforting, his safety was not his primary concern at the moment. A thought that was really driven home as the machine once again flared to life. The cursed suction had returned. The vacuum pull pulsed as before but wasn't as intense. Mike knew it's gentleness would not last though.

"This next phase is my own creation," Alicia spoke satisfactorily, "please take some mental notes as this routine is relatively new and I'd like some feedback."

"Sure thi..." Mike was interrupted as pleasure exploded in his brain. From somewhere in the front of the tube a flat, curved appendage extended to the underside of his cock. It had an uneven, bumpy texture but was velvety smooth. It started at the tip of his cock and drew itself slowly along his length. Mike's body shuddered lightly as it reversed direction and drew itself back to his tip. Coupled with the light pull of the suction the sensation was nearly indistinguishable from a slow, sensual blowjob.

Once the tongue like appendage reached his cock head it stopped and began to focus solely on his frenulum. It wriggled back and forth against the sensitive spot. All the while the suction pulled and tugged on every fiber of his member.

Between the waves of pleasure Mike glanced at his monitor. noticed she had gotten out a small lollipop. She sucked and lapped at it in perfect synchronicity with the machine. Seeing this sent his body immediately to the edge. His dick hardened and swelled in an impending orgasm. The machine throttled back to nearly a full stop. Only because his cock was in such a heightened state could he feel the visually imperceptible way it rubbed itself against the edges of his glans. Every small stoke caused the base of his cock to swell and tingle over and over again.

Alicia's expert program would not allow him off the edge. It continued to pet the underside of his glans at just the right time. Mike strained against his bonds and gripped the table so tightly his knuckles turned white. Lightening shot through his legs and his toes curled. He wasn't even sure he wanted to cum anymore. The sensations he felt were nearly as intense as a real orgasm. Mike's mind was consumed with pleasure and he could think of nothing else.

This was Alicia's favorite part of the job. If a donor made it this far without tapping out, the AI had learned their patterns well enough to keep them on the edge indefinitely. This turned the men into drooling, mindless pre-cum cows. Their sole purpose in life was to be milked for that valuable fluid.

After a full five minutes of keeping Mike on the edge the machine relaxed. They had purposely built in a few forced breaks into the algorithm. Based on previous experience, the donors would produce significantly more if allowed some time to hydrate and gather themselves periodically.

As the machine wound down to a stop Mike shuddered in relief, but also with a touch of disappointment.

"How are you feeling?" Alicia had popped her head up beside him, lollipop still dangling from her mouth.

Mike's only response was a grunt and a nod as he tried fruitlessly to regain his thoughts.

"Interesting," she replied and jotted a few notes down on a small clipboard she was carrying. "Just so you are aware, the AI could likely keep you like that indefinitely. It's algorithms are tuned pretty well to your brain patterns at this point. Water?"

Alicia handed him a bottle of water which he fumbled with.

"Let me help you," Alicia reached over and unscrewed the cap. She then slowly tilted it into his mouth and he swallowed it greedily. His body was covered in sweat like he just run 5 miles in the sun.

"Well," Alicia spoke up again, "any other comments on that last phase. I designed it myself and I'm rather proud of it."

Mike turned his head and stared her straight in those deep brown eyes. Only one word formed in his mind.

"More."

Alicia stifled a giggle and retreated back below the table. She the proceed to remove the box around Mike's testicles. It came off with a light pop as she broke the air tight seal. She licked her lips lightly as swollen orbs hung freely in space I front of her. She could feel their heat radiating off her face. Like the rest of his body they glistened with sweat. She donned a pair of nitrile gloves and reached down to a cooler at her feet. Pulling out a small ice pack she placed it gently on his scrotum.

All of Mike's muscle contracted at the cold, but welcome sensation.

"Sorry," Alicia spoke into the microphone, "I should have given you a heads up." An evil grin on her face betrayed that she purposely did not.

"This is a more recent discovery," she continued, "that if we lower the temperature of the testicles, even a few degrees, pre-seminole yields increase by up to 10%. We haven't built into the automation yet, so I need to do this part manually. I hope you don't mind?"

She had actually been dragging her feet on adding this to the extraction machine's protocols. In the early days she was much more hands-on with the patients. Since the advent of the machine and its AI, she had few opportunities like this anymore.

The ice pack she used was so small her fingers couldn't help but graze his balls. She worked each ball individually at first. She had to use two hands to move them apart making sure to place the compress on each side for several seconds. Mike groaned in pleasurable relief as the heat was drained from his body. His cock also stirred from her manipulations. He could tell she was being more than thorough. Her small, lithe fingers would linger too long on parts his scrotum, would push to firmly on areas of his taint. As his balls cooled, he could feel her hot breath on his sack, her face just a little too close.

Alicia had to be careful. Her body cried out to lick those juicy, dangling spheres, but everything was being recorded. Dr. Swan insisted on that for research and legal purposes. Alicia inhaled one last musky waif of Mike's scent before removing her hands. She was sure she heard a light whimper from above as she did so. Don't worry, she thought, I will take care of you. She pressed a button and extraction machine flared back to life.

The AI, detecting Mike's waning arousal during the operator induced pause, came at him in full force. If it was sentient, one would say it was angry at being interrupted. It pulled a hard, unrelentingly suction across the entirety of Mike's cock. At the same time a ring slipped down his shaft and another over his cock head. The ring at his shaft zipped to the base where it constricted tightly. It then moved quickly up his length stopping just under his glans, but not touching them. The ring then loosened and slid back down his length before again tightening back up at the base of his cock.

It repeated this milking motion as the other ring did the inverse motion on his cock head. It constricted to an impossibly small diameter at the tip of his cock before forcing itself down over his head. Unlike the ring on his shaft, which moved quickly up and down his length, this ring moved agonizingly slow, activating every nerve ending as it made it's plodding way over swollen glans.

Finally his engorged head forced it's way free, his glans flaring out angrily as the ring popped it's way across. The ring immediately expanded and lightly slid its way to the tip, only to shrink back down and begin again.

The dual sensations were so intense it took no time for Mike to reach the edge again. Oddly however, he didn't feel the same orgasm rising like he had before. Rather his body accepted this pre-climatic condition as normal. His cock swelled with pleasure heightening his sensitivity. He could distinctly feel ever push and ripple as the smooth silicon rings glided across his flesh. As before, they timed their movements to not let him slip over the edge. Mike's body was adjusted, and he noticed he could take more stimulation than before. The machine hardly slowed much as it sent him to new levels of ecstasy.

Alicia monitored everything, impressed from both a scientific and female standpoint. She had never seen seen anyone take so much stimulation before, and he actually seemed to be enjoying it. Nine times out of ten the donors have safe worded out soon after the start of this phase. Mike however was riding it and resisting orgasm wonderfully. He was also producing record amounts pre-cum.

Alicia rolled over to the fridge where the collected specimen was delivered. Through the glass door she could see the small glass vial about 90% full. For only about a 30 minute session this was extremely good. Most patients were luckily to fill half the vial in twice the time.

She disconnected the supply tube and quickly connected an sterile empty one. She picked up the clear vial and brought it to eye level. Males only produced a fraction of pre-seminiole fluid compared to actual semen volume. Even under exacting conditions their bodies could only produce at a given rate. The science was still unclear what the limiting factors were and if they could engineer a way to overcome them. Genetics definitely played a role, but was it the physical ability of the bulbourethral gland, or the shear pleasure tolerance of the donor.

The vial was only about two ounces full, a little more than a shot of liquor. She resisted the urge to pour it into her mouth. She imagined rolling the sweet, viscous fluid over her tongue before letting it coat the inside of her throat. This stuff was far to valuable to Dr. Swan's research, as was the bonus she got for optimizing the machine.

After she placed the vial back into the specimen fridge she checked Mike's status. All his vitals, although elevated, were in the normal range. The operator break override timer had almost reached zero again, indicating a patient break was necessary.

"Mike," she spoke to him through her microphone as normal, "only a few seconds more until I force a short break."

"No," she heard heard back through her monitor.

"What was that?" she was sure she had misheard him.

"Please...don't stop," he got out between heavy breaths.

"Mike, if this is about the money, you will make plenty more. This is just a temporary pause..."

"No!" He interrupted her, more forcefully, "I need more."

She stared at his image through her monitor. His forehead was pressed firmly into the cushioned table. His arms shifted from gripping the table edge to slapping it lightly. His legs trembled and his toes were in a permanent curl. He turned to look directly at the camera and face was pure bliss.