The bright overhead light burns your eyes at first as you sluggishly awake. You try and move your arm but it doesn’t budge. As you become more aware you realize you are naked strapped tightly to a medical table, your legs spread uncomfortably wide. What was in that bottle of water they handed to you while you signed the consent forms, you wonder, no medical test you’d signed up for before had been like this. None had also paid as well as this. Dr Metzger walks into the room with a female assistant close behind.

“Mr. Smith, glad to see you are awake, we are ready to proceed with the tests.” The doctor walks over to a table and grabs a syringe with an uncomfortably long looking needle. “This first test is a new drug, it greatly increases sensitivity and erectile function. It will ensure that you remain fully erect throughout the tests, the added sensitivity will offset any… discomfort you might feel negating the need for anesthesia.”

Dr. Metzger firmly grasp your cock in one had and plunges the needle deep into the flesh. You grunt in pain and let out a yell as the drug is injected. The doctor carefully removes the needle and release your cock letting it flop back down on you. The drug takes no time at all as you feel your cock start to swell.

“Ms. Scott, would you please finish prepping the subject.” Dr Metzger instructs

For the first time you take a good look at the assistant. A beautiful brunette woman with striking features. She silently nods to the doctor and begins walking towards you unbuttoning her lab coat. She removes the coat reveling a slim frame and two large yet perky breasts, they bounce and sway as she walks up to the side of the table. This may not be that bad of a medical test after all you think to yourself. She gazes down at your swelling cock as it continues to fill. Your cock twitches as it becomes fully erect standing straight in the air, but it doesn’t stop there. It feels as if it continues to get harder, your heartbeat can be felt in its throbbing mass, you didn’t think you could be this hard you wonder if your cock will explode.

Ms. Scott reaches down and gently grabs your throbbing cock, her touch is intoxicating. She starts to make small circles on the underside of your head with her thumb sending euphoric waves of pleasure shooting down your cock.

“The sensitivity drug definitely works Doc” you moan in pleasure.

Just as you close your eyes and start to enjoy the sensation Ms. Scott stops rubbing and you feel the cold touch of metal. She locks a metal cage around head of your cock, its uncomfortable small and head spills out of the cutouts in the metal. Ms. Scott gives the exposed head a quick brush with her fingers before turning to a table with supplies. She turns back with what looks like a butt plug, it has a hooked shape to it and ends in a large metal ball. You start to question what she is doing as she places in against your ass. Before you can complete your protest, she rams the plug home and metal ball slamming into your prostate. Your half complete sentence ends with a groan, she just gives you a devilish smile.

Dr. Metzger reappears pushing a small table, he slides it between your legs right up to you and sits down on a stool. Ms. Scott returns to your side her tits swaying over your face, she reaches down to your cock and gently strokes it. That drug is something else as your panic and anxiety melt away again as the waves of pleasure emanate from your rock-hard cock. You feel a slight pinch in your balls fighting against the pleasure that snaps you back to reality. For the first time you notice a screen behind Ms. Scott, it is an overhead view of your cock and balls. On the screen you see the doctor has made two long cuts into your scrotum. As you watch in a state of shock the doctor carefully removes one of your balls from its flayed sack and gently places it in a special clamp. You glance back at Ms. Scott, she is biting her lip watching the procedure. She reaches up with her free hand and starts pinching and twisting her nipple closing her eyes in pleasure. She stops stroking for a moment and you fully feel what the doctor is doing and yell in pain.

“Ms. Scott!” the Dr Metzger barks, “Some professionalism please!” She snaps back to attention and resumes the slow stoke of your cock. The doctor turns to you “My apologies Mr. Smith you will have to excuse Ms. Scott. She was a test subject of mine once, the procedure unfortunately left her with an extreme case of sexual sadism. Normally this would be a concern in this line of work, but it’s so hard to find good help. For the next test I have a new drug, it increases sperm production and reduces sperm maturity time from hours to mere minutes.”

Before you can fully comprehend the doctor grabs a syringe off the table and stabs it deep into your exposed testicle. The pleasure from your cock is no match for what is the worst kick in the balls you’ve ever felt. As the doctor injects half the syringe into your defenseless manhood you fight the urge to throw up, your stomach feels lodged in your throat. The doctor removes the needle but before you can catch your breath, he stabs it into the other repeating the process. You stare up at Ms. Scott and see her devilish smile through your tear-filled eyes. You feel your balls expanding against the once gentle clamps as the drug takes effect.

“Ms. Scott please bring over the electro-ejaculator.” Asks Dr. Metzger. They attach wires to the plug and the cage around the head of your cock. The doctor fiddles with some switches, “I think we are ready Ms. Scott.” He flips a switch. You are struck with an overwhelmingly painful sensation as current punches into your prostate. As fast as it states it ends. “It appears the intensity amplification module is malfunctioning and only supplies full power.” Dr. Metzger says. “Ms. Scott do we have a replacement module in the supply room?” She shakes her head no to the doctor, as he mutters to himself, she looks down at you with a secretive look and nods at you giving a wink. As you open your mouth to point out Ms. Scott’s lie the doctor sighs, “It would be waste to not complete the experiment after all this work.” He flips the switch again.

Your hips fight against the restraints as your back arches. The pain is excruciating as the full power of the machine fires electricity trough your prostate and out the head of your cock. You scream for what seems like an eternity as you lose all control of your body. A burning sensation fills your cock as cum starts to erupt from your caged head. Rope upon rope shoots out more cum then you have ever seen. The doctor takes notes as he watches your ball empty held firmly in their clamps. He turns off the machine examining your shriveled balls. You gasp for air, the pain starts to subside as Ms. Scott resumes the gentle stroking of your cock, she also pants heavily with an orgasmic look upon her face.

As you regain your senses you feel something happening with your poor abused balls. You notice on the screen the doctor is cutting into your testicle with a scalpel. You wince at the dull sensation as your balls are dissected while still attached. “This looks very good, very promising, the drug appears to have no negative effect on the tissue. I will need them for further study though.” The doctor expertly ties off the cords and finally removes your aching mangled balls placing them in a surgical pan. As he slides the table away Ms. Scott removes the cage from your cock, the burnt outline of the electrode remains on your still raging hard on. She then removes the plug from your ass. The doctor walks back over and examines your cock.

“Hmmm, there still seems to be some issues with erectile serum.” Dr. Metzger notes. “While it has maintained the erection there appears to be surface tissue damage, I wonder what internal damage has been done?” Your eyes widen in horror. “I will have to investigate that later though," he turns to you, "Mr. Smith you have a done a great service for medical science today thank you." "Ms. Scott can you please finish up here?” She nods to the doctor as he walks out.

She steps between your legs and firmly grasps your cock, she smiles as she starts roughly stoking. Sensations of pain and pleasure wash over you as the drug fights against your burnt cock head. She starts breathing heavier, her breasts heaving with each breath. The feeling of pleasure starts to overcome the pain and you enter a state of euphoria, as you close your eyes letting the pleasure wash over you Ms. Scott lets out an orgasmic scream. You open your eyes in surprise as it’s the first sounds she made. With a fire in her eyes she make one smooth slice with a scalpel. Her body shudders as she lets out another scream, your cock held above you in one hand andf the scalpel in the other. She climbs on top of you as you scream in pain. She presses a finger to your lips, "shhhh." Effortlessly she plunges the scalpel into your neck, your screams are replaced with a soft gurgle of blood. Ms. Smith moans in ecstasy as she grinds on the stump that had been you cock. As the world around you fades to black you hear her cum again.