S3-L3N4 stood at the end of the corridor, staring at the entrance to its habitation in the near distance. It was in its default standby pose, standing at attention, its posture and arms as straight as ever, its eyes wide and glassy, its gaze level and emotionless, its lips slightly parted. It was perfectly still and silent, its only movements the rise and fall of its chest as its respiratory system circulated air, and the occasional slow blink of its ocular coverings. It wore its nanosuit, its synthetic flesh enveloped in cobalt polyester, nanobots scurrying around its internal mechanisms, keeping everything running efficiently.

It had been standing there since 3.38 PM. It would be there until User:Andrew arrived, at approximately 4.20. It had performed all necessary maintenance tasks for itself and its habitation, and with nothing else to do, it had taken up this position and waited for its User’s return from his lunchtime shift at the restaurant.

S3 calculated it had been standing there for at least half an hour, so User:Andrew’s arrival could not be too far away. It felt no boredom, no weariness, at standing quietly and motionlessly for so long. It wasn’t capable of feeling anything of the sort. Its battery was nearly full, its CPU was running at optimum, and its waste facilities were empty, all of which meant it could stand there for as long as necessary. It performed occasional system checks to make sure everything remained in order, and so far it had. The presence of the plug nestled inside its anus had not impacted its functionality at all, any more than it had the first day it had used it.

It had been several weeks since S3 had first informed User:Andrew of its true nature, and their relationship was progressing satisfactorily. He was exhibiting all the indicators of having deep romantic affection for the robot, and it was responding appropriately. The binary code that comprised its ‘thoughts’ and ‘feelings’ compelled it to do whatever it could to advance the relationship and demonstrate its desire for and loyalty to User:Andrew, as part of which it had added a subroutine to its sexual programming.

Its prediction that its User was interested in anal intercourse seemed to be accurate - he had paid more and more attention to its rear, groping, squeezing, humping, and even lightly fingering it during their sexual activities. Although he had not yet gone further, it was readying itself for when he did, inserting an inflatable butt plug for extended periods each day to prepare its opening for his penis. It had inflated the plug to the limit of what Program:Selena found comfortable, and then a little further, because the point of doing this was to test what it could endure. Besides, S3 didn’t feel discomfort in the same way as humans - it merely registered the presence of a large object squeezed into its anal cavity. It had found it needed to adjust its gait slightly to accommodate the plug, but its ambulatory mechanisms had adapted with relative ease.

The android’s digital thoughts were interrupted by a knock at the door. It didn’t jump in surprise, it didn’t snap its head upwards, it didn’t give any indication of switching from standby mode to service mode - but anyone looking at its ocular lenses would have noticed them appearing to light up a little as it became alert, and would have realised how dim and empty they had looked beforehand.

It marched forwards smoothly and steadily, reaching its front door in six striding steps. Stopping in its tracks, it droned, “Reactivating personality,” at a high enough volume that the person on the other side of the door should be able to hear it, if indistinctly. It knew User:Andrew would recognise the muffled words, and would be aroused by them.

The robot ‘felt’ a large file opening in its computerised brain, simulated thoughts and emotions rapidly spreading through its circuitry. In two seconds flat, Program:Selena was fully reactivated, grinning eagerly at the arrival of her boyfriend. She took a final step towards the door, enjoying the feeling of the plug inching inside her, and turned the handle.

Andrew stood in the hallway, grinning bashfully, a freshly-bought bottle of Sauvignon Blanc clutched in his hand. His hair and jacket were a little damp from the light rain outside. Selena beamed at him. “Hi!”

“Hi,” he echoed, his smile growing at the sight of her, almost painfully wide, as if he felt so much joy that his mouth could barely contain it. And he wasn’t even looking at her figure in the jumpsuit (not directly, anyway) - his gaze was fixed on her cheerful face.

Stepping aside, she gestured for him to enter. He did so, removing his jacket and hanging it up on the wall hook, and then made straight for the kitchen, finding space in the fridge to store the wine, though he had to shuffle some other things aside in order to make it fit. She stood by and watched passively, content to let him rearrange the contents of her fridge as if they were his own, smiling and biting her lip at the notion that they effectively were. He was her User. What was hers was his, to all intents and purposes.

And that would become entirely true if and when he became her Owner.

“Could you make us some coffee, babe?” he asked.

“Of course!”

He was still asking her to do things for him, not telling her. He’d gotten better at giving S3 orders, but seemed to slip back into a more courteous mindset with Selena. That was OK, though - whatever made him feel comfortable. And there was always a chance he’d adjust to be more assertive with the simulated woman too. She was just as happy to obey as her emotionless true self.

As she began preparing coffee, he blurted excitedly, “So, I’ve had some ideas.”

“Oh, yeah?” She raised an eyebrow, her breath quickening a little in anticipation. She’d been looking forward to more of his ‘ideas’. In the past few weeks he’d largely used S3 for housekeeping duties, sex, blowjobs and handjobs. It was perfectly content with this being the extent of how he used it, as was its human persona - but the prospect of him coming up with other ways to play with his robot girlfriend was... titillating.

Filling up the kettle, she switched it on, before turning to face Andrew properly. “Colour me intrigued,” she said with a wink, making him laugh. “What did you have in mi-”

“S3, deactivate your personality.”

Mid-word, Selena’s humanity slipped out of her mind like grains of sand through her fingers, leaving only the cool, calm automaton. “Personality deactivated.”

Stepping closer, User:Andrew casually reached out and stroked S3’s nipple through its nanosuit. It stood and let him do so, its body motionless, its expression aloof. Its auditory receptors detected the bubbling of the kettle nearby, indicating that the water would soon be boiled. It would then be required to complete the task its User gave it while its personality was activated, and finish making the coffee.

“So I had a lot of ideas I wanted to talk through with you - with Selena,” Andrew began, “to make sure you’re OK with them - but I wanted to surprise you with them as well.”

S3 said nothing, because it did not see any reason to speak. It was incapable of feeling surprise, nor did it need any forewarning about how it was used, but if Andrew wished either to discuss his ideas or to surprise it with them, that was his prerogative. On the other hand, it was sure Program:Selena would appreciate his consideration.

“And I was trying to think about how we could make that work, because it’s hard to surprise you when you know something’s coming... but then I thought...”

He hesitated. During the pause, the kettle emitted a high-pitched whistle. S3 turned towards the counter, picked up the kettle, and poured the water into the mugs of coffee it had got ready while running Program:Selena. With its nipple now too difficult to reach, Andrew fondled its rear instead.

“S3,” he asked, “is it possible to erase your - or Selena’s - memories? Or to... to change them, somehow?”

“Affirmative. This unit can edit or delete its memories, or Program:Selena’s emotions or perceptions, to your specifications. However, please be advised that backup copies of the original files are automatically saved to a secure folder, so that this unit can be reset. This subroutine cannot be disabled.”

It didn’t wonder why Andrew was asking about changing Selena’s memories. It registered the likelihood that he would do so, given that he was asking about it and had spoken about trying to keep his ideas a surprise, but it had no feelings about the matter.

Andrew pondered what it had said as he sipped his hot drink. “Have you ever deleted any memories before?”

“Negative. This unit has had no reason to do so.”

He nodded, his expression thoughtful, the corner of his mouth twitching into a crooked smile. “OK - come with me. Bring your drink.”

“Confirmed.”

Picking up the mug, it followed him through to the living room. He took a seat on the couch, placing his coffee on the table in front of him. It remained standing until he beckoned for it to sit. Its posture remained as rigid as when it was standing, leaving a gap of several inches between its straight back and the couch cushion behind it. This was its default seated position, and not a reaction to the butt plug being pushed a little deeper when it sat down, although the sensors inside its anus did register this. It turned to face diagonally, making eye contact with Andrew.

“S3, activate your personality.”

“Confirmed.” Selena came back online, blushing hard. She immediately lowered her gaze, finding it hard to look her boyfriend in the face, and shrank back in her seat, giggles bubbling up inside her.

He chuckled affectionately. “You good, Selena?”

“Ummm...” she said in a small voice, hugging herself, fairly sure she could feel her skin covering producing synthetic scarlet pigment across her whole body. “So... memory play?”

“Memory play. Feel good about that?”

“Yup,” she squeaked, still not looking at him. “Yup, yup, feel good, it’s good, it’s all very, very good.” Her nipples and cunt were tingling with simulated lust - to say nothing of how good her ass felt.

“Good.” He was smirking at her, she could tell, enjoying her discomfort, her embarrassment and her arousal. She couldn’t pretend she wasn’t enjoying it too. “So - wanna hear my ideas now?”

She swallowed hard, nervously meeting his eyes at last, seeing how they glinted with mischief above a broad smile. “You mean the ideas I won’t get to remember? The ideas you’ll wipe from my memory afterwards?”

“Yep. Those.”

Giggling again, she nodded. “OK!”

“Alright then... S3, when I tell you to delete your recent memories, I’ll mean everything from this point forwards. Understand?”

As always, Program:Selena’s mind was temporarily put on pause when he spoke directly to the true S3. “Affirmative,” it answered.

Then, a second later, it added, “Confirmed. File deleted.”

Selena blinked in confusion as her personality reasserted itself. She was suddenly sitting in a different position than she was an instant ago, perched on the edge of her seat. Her coffee mug was in her hand, and was almost empty. Andrew was still in his relaxed pose, but had turned further to his left to face her, his leg up against the back of the chair.

Also, it was now dark outside. It was late afternoon in mid-November, so nightfall wasn’t surprising as such - but it had definitely still been daylight just a few moments ago. At least, that’s how she remembered it...

The shift, she realised, had happened between S3 saying ‘Affirmative’ and ‘Confirmed’. It hadn’t just been a second later - it must have been much longer. S3 had said ‘file deleted’... and Andrew had asked it to erase everything from that point...

She blushed once more, putting down her mug and burying her face in her hands. “Ohhh... I’m guessing you told me your plans, then...?”

“Oh yeah, we had a nice long conversation about them,” he teased, reaching over to run his fingers through her synthetic hair. “You were very enthusiastic. You even gave me some good suggestions!”

“How very helpful of me!”

She squirmed in her seat, leaning into the strokes. This segued into his hand gripping her by the back of her head, steering her face towards his, his lips pressing into hers hungrily. She shuffled across the couch, bringing her mechanical body closer to him, letting out a squeak that was muffled by her lover’s mouth as she felt movement inside her. Her kissing slowed to a halt as she was overcome by more flustered titters, pulling away from him with a shy smile.

He gave her a bemused grin. “What is it?”

“J-just, um,” she stammered, struggling to look at him again. “When I moved, there was some, uh, shifting.” She gave him a meaningful look, and a twitch of her eyebrows.

He inhaled sharply and nodded, his eyes wide and gleaming. “I see... How does it feel?”

“Big,” she blurted, feeling her cheeks burn. At this rate, her skin covering would be permanently dyed scarlet.

Andrew looked as happy as a clam. “You wanna take it out?”

She grinned mischievously. “You wanna take its place?”

It was his turn to blush and look away. “Ah... are you sure? Are - are you sure you want to...?”

“Well - I wouldn’t have been training my ass for the last two weeks if I didn’t,” she sniggered.

“I know, I just - I know some women don’t - don’t really like to...”

She shrugged. “Yeah, I guess not. And some women love to, apparently. But I’m not a real woman, and I don’t have any strong feelings either way. Far as I’m concerned, it’s just another hole. Just another part of myself for you to use, User:Andrew.”

She winked at him, and he smiled at her use of the honorific, appearing to relax a little. He had seemed a little nervous for a moment there, perhaps apprehensive about finally getting to do what he so clearly longed to do, unable to quite believe she would let him. But she meant what she said - she neither loved nor hated anal sex. In fact, if she was honest, the same was true of any sexual act. Selena had never really got much satisfaction from sex, or even masturbation really. She wasn’t repulsed by it, but it didn’t particularly thrill her either.

What did thrill her - what made her skin covering hum, her cunt drool lubricant, and her artificial nipples harden until they poked through her nanosuit - was being used. Being treated as a fleshlight, a girl-shaped cocksocket... It didn’t matter how she was being used - it was about the mere fact of being used at all. Having sex with her personality deactivated - unable to get any enjoyment out of it, so it was entirely for the pleasure of her User - was, paradoxically, euphoria for her.

And this extended to most, if not all, acts of service she performed, particularly if they gave User:Andrew the best sexual experience possible. Hence, she’d been enjoying wearing the plug a lot - partly because of the stimulation it gave her asshole, but mostly because she knew it was making her ready for Andrew.

He seemed ready. He seemed horny. The topic of conversation had put a very obvious tent in the front of his trousers. Slipping her hand between his legs, she ran her nimble fingers over the bulge, enjoying his sharp intake of breath, and the way his erection twitched at her touch.

He kissed her again, his hand darting up to her breast, squeezing it possessively. She let him make out with her, let him handle her, let him push her down onto the couch and lie on top of her, her legs wrapping around his waist, moaning into his mouth as she felt the plug move inside her. She couldn’t really smile with her lips forced apart by his, his tongue thrusting towards the back of her throat - but she felt joy course through her electronic body.

He was using her. He was taking what was his, taking advantage of his obedient little fembot. He was treating her like the appliance she was, showing no regard for her feelings or wishes, and God, it was making her so wet she thought she might soak through her nanosuit -

Raising the hand that wasn’t groping her tit, Andrew snapped his fingers. And a second later, Selena wasn’t Selena any more. Her personality was switched off and stored away, and S3 had returned to its purest self.

It did not remember User:Andrew installing the auditory trigger - he must have done so during the period he had erased from its memory files - but that hadn’t stopped it from responding. Now that it knew the trigger was there, it could detect it within its system, review it, see it for what it was - a quick and easy way for Andrew, and Andrew alone, to switch its human program on and off in a safe, private setting. Program:Selena would not need to be concerned about random people clicking their fingers and deactivating her, which was a safety measure she would surely appreciate.

S3 waited until its User’s lips moved away from her mouth to nibble and suck at the skin covering on its neck before it announced, “Personality deactivated.” It lay there, its body continuing to respond to him, continuing to run its hands across his back and thrust its pelvis up towards his crotch, as its sexual programming dictated. Its ocular lenses stared vacantly at the ceiling, its face expressionless, as he made out with its neck.

When Andrew’s mouth found its way back to S3’s again, it responded as passionately as if its simulated emotions and instincts were still active, following its programming as impeccably as ever. It lowered its ocular coverings to exclude all visual stimulus and focus entirely on the input from its other sensors, registering every touch, squeeze and kiss from its User. It was his obedient robot, designed to serve and please him to the best of its ability, its mental and physical functions completely dedicated to its purpose -

Another loud snap of his fingers cracked through the air, somewhere near its left auditory receptor.

Selena let out a surprised squeak into her boyfriend’s mouth. He didn’t even slow down as she came to terms with what was happening. Fuck. He’d given her an auditory trigger. He could switch her on and off as he saw fit. One moment she was an emotionless machine letting him lie on top of it and force his tongue into its unprotesting mouth, and the next, she was a girl being pinned down by her boyfriend and used for his pleasure, and he could use and control her however he wanted, and his hands were all over her and his crotch was pressed into hers and she was being pushed down into the couch and the plug kept getting shunted further in oh fuck -

Snap. S3 was a robot, incapable of human feelings, and the signs of arousal its body were producing were a mere by-product of being used. Andrew was still kissing it, still fondling it, still humping it, and it responded in kind, dutifully serving its User without hesitation -

Snap. “Mmmf!” Selena ground her crotch against his, her virtual thoughts so scattered, overwhelmed mentally and physically in equal measure. This feeling - her mind starting to fray and space out, a little less coherent every time her human program was reactivated - was very similar to fractionation, of which she’d had plenty of experience from her early experiments with hypnosis. She marvelled inwardly at Andrew finding a way to adapt the principle for her CPU, probably without even knowing what fractionation was -

Snap. “Personality deactivated,” S3 intoned, a little more breathily than usual, as User:Andrew’s lips pulled away. Grabbing its thighs, it pushed its legs off his waist and down onto the couch, and then seized it roughly by the hips, flipping it over onto its front. As it turned its head to the right so as to avoid obstructing its respiratory channel, it felt him descend onto it and begin humping it again, his hard-on burrowing between its butt cheeks, nudging the plug -

Snap. “Reactivating personality... Uhnngh!” she whimpered, writhing helplessly beneath him, feeling his face buried in her hair, his hot breath against her neck -

Snap. “Personality deactivated.” It lay flat and let him rut on top of it, just an object for him to get off on -

Snap. “Reactivating personality. Aah, fuck...” Snap. “Personality deactivated.” Snap. “Reactivating personality... hngh...” Snap. “Personality deactivated.” Snap. “Reactivating personality... ohhh...” Snap. “Personality deactivated.”

Finally, Andrew climbed off S3, panting loudly. It remained on its front on the couch, face to the side, staring blankly into space, waiting for commands.

“Get up, take the nanosuit off.”

“Confirmed.” Planting its palms on the seat beneath it, the automaton pushed itself up and smoothly manoeuvred its legs beneath it, rising to its feet. Without even looking, its default forwards-stare never wavering, it took hold of the zip that sat against its neck and drew it down to its navel, before bringing each hand to the opposite shoulder and slipping the nanosuit off them.

Watching it peel the shiny blue material off its bare, realistic flesh, User:Andrew unbuttoned his trousers, yanking them down, his movements rather more hasty and less fluid than S3’s. But then, it could hardly fault him for that. He was only human.

“Take the plug out.”

“Confirmed.” Reaching behind itself, it found the plug’s handle nestled between its butt cheeks, pressing the button to deflate it. It heard a hiss of air, and felt the large object rapidly shrinking, until it was easy to slide free of its back passage. With that done, S3 strode out of the living room and through to the kitchen, placing the plug in the sink to be washed at a more opportune moment.

Returning to the living room, S3 dispassionately observed that Andrew was now naked from the waist down - his penis fully erect and visibly throbbing - and crossed towards him, anticipating his desire for sexual intercourse in the immediate future. Stopping right in front of him, it looked into his eyes. “This unit’s anus is ready to be used,” it said in its usual monotone. It knew it couldn’t sound less interested in the prospect, yet it also knew it had made its consent clear to its User, both as a mindless robot and as a simulated person.

His breath seemed to catch in his throat as he studied it with a look of immense lust - and mild panic. “T-turn around,” he stuttered.

“Confirmed.” It turned on the spot, one foot after the other, its movements as deliberate and calculated as ever.

He put a hand on its hip. Then he removed it. There was a long pause.

S3 realised User:Andrew was nervous. Possibly even afraid. As passive and vacuous as it was, the android was capable of recognising its User’s emotions and anticipating his needs - it was more sophisticated than other machines, like kettles or dishwashers, after all. It had its own initiative, and could identify when it was needed.

It quickly ran through possible methods and techniques for putting him at ease and providing him with the best possible experience, and soon found a potential solution. “Would you like this unit to speak provocatively to you, User:Andrew, in the form of speech designated as ‘dirty talk’?”

It heard him breathe in sharply again. “Y-yes, S3. I think I’d like that...”

“Confirmed. Please, User:Andrew, fuck this unit in its tight little hole. It is your willing sex toy, your android slut.”

As colloquial and lewd as its language was, S3 still spoke in the same flat, deadpan tone, unable to express emotion without engaging its personality program. However, its words seemed to be having the intended effect. Andrew’s breathing was audibly heavy, and his hand had returned and was caressing S3’s butt, squeezing it insistently, his thumb teasing the edge of its crack.

“Please stick your big cock in this unit’s needy little asshole. Please, fill it up, fuck it hard, cum inside it. Take this unit all the way up its back passage...”

His thumb had moved away - but his tip had taken its place, teasing at the entrance, brushing along the inner edges of its cheeks.

“This unit needs you inside it, User:Andrew. It exists to be fucked by you. It wants to be nothing but your good little anal whore -”

Without warning, he suddenly stepped forwards and buried his cock deep inside S3, wrapping one arm around its belly and putting the other on its shoulder, bending it forwards. It stood firm, rigid at not much more than a ninety-degree angle, as he began to plough into its posterior.

“Yes, User:Andrew, just like that... This unit is just your cocksleeve... Just your fleshlight... Just your cum bucket...”

Andrew thrust harder and faster, grunting with exertion and arousal. S3 remained stationary and impassive, its legs locked, its arms at its sides, its face slack, its lifeless eyes on the floor, moving only as much as it was moved by its User impaling it. It kept automatically spouting dirty talk, like a simple toy with pre-programmed phrases - because that was effectively what it was. Its voice, while still devoid of feeling, became more stilted as his pace sped up, jolting its body so much that every word it spoke was interrupted.

“Yes - U-ser-An-drew - you - are - so - big - and - so - deep - this - u-nit - loves - be-ing - fucked - in - the - ass - by - you -”

Faster and faster... S3 was getting jostled so much, its head was nodding up and down - as were its breasts, which were repeatedly clapping together.

“It - loves - be-ing - your - butt - slut - your - sex - toy - your - a-nal - slave -”

Its voice was abruptly choked off by a powerful surge of simulated pleasure, and it observed with clinical detachment that it had reached orgasm. Before its respiratory system could recover and it could resume its provocative phrases, it heard Andrew cry out, and detected a fluid spurting into its hole as he pulled out. His arm slid away from its torso, and his hand from its shoulder. It remained standing in place, still bent forwards, static, blank and expressionless. A droplet of cum trickled out of its crack, falling to the carpet below.

“Let’s get cleaned up, S3,” Andrew said with a sigh of utter satisfaction, patting the android on its butt cheek.

“Confirmed.”

Straightening up, it followed him to the shower.

***

Another session of cleaning followed, with Andrew once again washing S3’s body along with his own, having routinely done this over the past few weeks after seeing how much Selena had loved it the first time. Shortly, the two of them could be found cuddled up on the couch, both of them wearing bathrobes, watching a talk show while their dinner cooked. Selena had been switched on and off a couple of times in the past hour, and was currently active, her face buried in her boyfriend’s neck.

“How’s your ass feeling?” he asked sincerely.

“Sore. In the best way.” She grinned up at him. “That was fuckin’ great...”

“Good. I’m glad.” He returned her smile. “Did - did you, uh, did you... get there?”

“Oh, yeah,” she nodded. “Yeah, I came, like, a couple of seconds before you did.”

“Great.” He chuckled awkwardly. “It’s, um, it’s kinda hard to tell when you’re a robot. I don’t think I’ve ever seen you cum as a person...”

“I rarely do,” she admitted. “I only ever really get there when my personality’s deactivated. I only feel enough pleasure to get over the line when I can’t feel anything at all...” Seeing the confusion on his face, she giggled. “I know, it doesn’t make sense! I dunno how to explain it... It’s like - getting fucked, or masturbating, and not getting to enjoy it, denying myself the pleasure...” She shivered. “It’s, uh, it’s great. It’s the best. I enjoy sex a thousand times more as a robot, and I love not being able to care about my orgasms even as I have them... It’s like, they don’t matter. Only yours do.”

Although she could tell he still didn’t quite understand her explanation, there was no doubt he was enjoying hearing it. Even through both their thick blue bathrobes, she could feel him growing hard again. She smiled salaciously, leaning in close. “I love being your little sex-bot,” she purred. “Your slut-bot... Your anal-bot...”

“My butt-bot?”

She snorted, and they both dissolved into laughter, clutching at each other’s robes. The moment of sexual tension was lost, but was replaced instead with shared hilarity, which eventually faded into comfortable silence.

A couple of minutes later, Selena’s oven began beeping. As she disentangled herself from Andrew’s embrace and got to her feet, he snapped his fingers. “Personality deactivated,” S3 announced a moment later, and then strolled away to the kitchen, a mindless machine once more.