She into the chamber and found the slave already waiting for her, shackled to a steel loop in the ceiling by his wrists, sinews pulled taught, and naked, except for a slim metal collar about his neck. Like all slaves bred for this purpose, he was well muscled, tall and with a pleasant olive complexion all over, smooth having been recently shaved hairless from head to toe for the purposes of hygiene. Being a male he was unable to speak but despite his submissive situation his eyes looked defiantly, nearly gloatingly, from beneath heavy brow ridges. She felt a strange eagerness to start her work.
She appraised his sex organs. His large, dark, heavy looking penis was at rest - for the moment - but had a battered look about it through frequent abuse. His balls were abnormally large and heavy from the drugs he'd been administered and would probably burst if left in their present state for an extended period. To business then.
She went to the rack of tools on the wall and selected a light whip. As she was unfamiliar with this slave, procedure dictated that she assert her dominance. Males could be dangerous. Ten lashes would suffice. By the 6th stroke he started to grunt and by the 9th the grunts began to sound frantic. For her own amusement she finished up with a shock to the collar about his neck from the control box in her hand, watching him writhe in pain for a few moments. She hung it on her hip for him to see as a deterrent against any thoughts of violence he might be harbouring towards his tormentor.
Making eye contact she unclipped his manacles from the loop above his hands. A quick shock from the slave collar again, to remind him to behave. She ushered him over to the processing station with a flick of the whip against his lash striped bare buttocks and a flick of her eyes to the corner of the room. She strapped him to the frame in a standing position, first his ankles, legs apart, then his wrists, behind his back with his hips thrust forward her finger was constantly near the control box button ready to punish any sign of disobedience.
Now that he was restrained she could relax more. Next she turned her attention to his testicles, clipping a heavy metal cuff around the top, adjustable so the balls could be pulled downwards or allowed back upwards as required. The final part was the suction sleeve which would clamp around his erect cock, currently flaccid. He was an uncooperative one. Not unusual but sometimes problematic.
Turning to the glass panel on the wall she unzipped the front of her uniform and eased out the heavy swell of her pink tipped breasts. Not really standard procedure but she found it helpful to the process. She appraised them briefly - she'd always thought them too large but the males generally responded well to the visual stimulation. Good for productivity.
She watched his penis start to harden and lengthen involuntarily at the sight of her for a few moments. Good. She put on the latex gloves from the bench beside the processing station and applied a small quantity of lubricant to the now erect and throbbing organ. Feeling the warmth of it penetrating through the gloves, she gave the end of it a few playful flicks and watched with delight as he flinched. She began massaging it as he struggled against the restraints and grunted in anger. A few quick back hands to his swollen balls convinced him to quieten.