FOR SCIENCE! M/F/F Lewd Oneshot

Dorarizin M
Human F/F, Fraternal Twins

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Sorry for the long delay! We'll be back to normal posting - and catching up - real soon. <3

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Dgrezrhg-of-Arzrgreer checked his inbox again. The message was still there, and he still was uncertain what it had meant by saying he was “strongly encouraged to participate” in some sort of human study “into the mating habits of Dorarizin males in rut.” He’d been requested to meet the researchers on the station, inside what they had called a “private examination room”. Standing outside the place - and he did confirm that the address matched the one given in the message - it certainly didn’t look like a research center. 

It didn’t really even look like a public health clinic. 

He poked his head inside to find an uncharacteristically empty waiting room on a station this bustling. Stepping inside, the door slid closed behind him, and suddenly the atmosphere was calm, silent. It was as if he was completely isolated from the busy, noisy, aromatic station outside. There was a screen attached to the small desk that sat opposite the doorway, which lit up once the door had closed. On the screen was an arrow pointing toward a door at the back of the room, with a label beneath it: “Room 6”. 

He looked around the lobby tentatively, before making his way across, opening the door and sticking his head inside inquisitively. Behind the second door was a stark white hallway with aggressive, pale lighting. There were six doors, and as he carefully stepped into the hallway, the entrance again automatically closed behind him. He glanced back at it uncertainly as it shut; now he was in too deep. ‘What kind of place is this, anyway?’ he thought, as he made his way to the door in question.

The portal to room 6 slid open and shut as quietly as all the others, and inside he found what appeared to be some form of examination room. There was a large, flat slab attached to the wall, and a bench-like seat across from it which he quickly availed himself of. Looking around, he realized there was a stunning lack of what might be considered “examination equipment”, though he did notice what might be a camera set into one of the corners of the room, near the ceiling. 

His thoughts were cut short by the sound of footsteps clacking against the hard floor of the hall outside. They sounded something like Dorarizin - or maybe Karnakian claws, but there were only four distinct sources, where there should be at least twice that. It also took them longer than he had expected to reach his room, and he had just pieced it together that these must be humans when the door opened, and he laid his eyes on the most curious pair he’d ever seen. 

They looked alike, like members of the same litter, but one had skin much darker than the others’, who in turn was almost as pale as the walls were white. Her unblemished complexion was framed by a head of long, black hair which hung from the back of her head in what he’d been told was called a ponytail. Her apparent sister’s hair was tied up in a bun, and was straw-like in its coloration, though as the door closed behind them she was already beginning to let it down.

The black-haired one was first to speak, holding an oversized PDA in her hands as she glanced at it. “[Mister . . . [Dgrezrhg], yes?]”

 Dgrezrhg simply nodded slowly. As she looked up again, he noticed how ... curious her eyes were. One was blue, and the other green. As her sister stepped forward, he realized that hers were the same way, but reversed. “Mind if we just called you ‘Dizzy’?” She asked as she began to circle around him slowly, clearly inspecting him. He nodded again stupidly, not really paying attention to her words as he was distracted by how much of her he could see through her jumpsuit. A white coat tried to cover her broad, heavy chest, but could barely fit around it, let alone over it. The pale one spoke up again, “I am Isabella, and this is Gabriella. We understand that you are presently ‘in rut, and we would appreciate it if you would aid us in our research efforts.”

 Gabriella spoke up again almost as soon as Isabella was finished, adding, “If you’d like, you can call us Gabbie and Izzie, Dizzy.” Her tone was light, playful - hardly the kind of tone he’d expect of a scientist. As her high-heeled shoes continued to clack against the floor behind him, he could feel her gently tug at his tail, prompting him to reach back and tug it away from her, holding it close to his body as he looked over his shoulder at her. Both sisters giggled.

 “He’s cute,” Izzie added as she set down the tablet on the slab extending from the wall.

 “Very. Another winner, I’d say,” Gabbie replied, coming around the other side of his massive frame.

“Winner? Just what exactly did I win?”

 “Figure of speech,” Isabella replied, smiling as her sister took her place next to her again. Gabbie spoke up next, stating in a rather matter-of-fact tone, “We are from the Anderson Institute of Interspecies Research, and we want to do some . . . interspecies research with you.”

“Research?” He asked in reply, a bit incredulous at the request.

“Think of it as a . . .” Izzie began, before Gabbie finished for her, “A cultural exchange of sorts.”

Dizzy turned around, as looking at them was distracting his thoughts, and he definitely need a moment to think this through.

“Just because I’m in heat doesn’t mean-”

By the time he collected his thoughts enough to look up, the two curious women were already out of their coats and in the process of fumbling with the zippers that kept their bodysuits taut around their forms. He was just about to open his mouth again to protest when Gabbie managed to get her zipper down over the massive bump in her chest. His complaints died in this throat as two massive orbs of soft, pillowy flesh exploded outward. Izzie’s followed quickly after, nearly brushing up against her sister’s due to how close they’d been standing. Dgrezrhg was slack-jawed, tongue hanging out slightly as his eyes shifted between the splendid pair of racks. 

“Now, you were saying, Mr. Dizzy?” Izzie teased, bringing her hands together just below her waist, her arms pressing her chest together in the process and exaggerating its already prodigious size. While he was distracted with Isabella’s chest, Gabriella had stepped forward and begun tugging his own zipper down. Before he really registered what was happening, let alone before he could stop her, she had managed to open up the front of his suit completely. 

The opening that revealed the grey fur of his underbelly tapered down from his broad chest, across his abdomen before finally coming to a point just below his now-protruding sheath - and the thick, blue-skinned member that was beginning to slide out from within it.

He reached down to tuck it back inside, but was beaten there by Gabbie, whose wonderfully warm hands began to coax his tool out further. 

“Quite the impressive specimen, Izzie,” she teased as she glanced back at her sister, who was just now approaching Dgrezrhg. As she knelt down beside her sister she nodded in agreement. 

“Such a pretty color,” she replied with a smirk before pressing her face up against the underside and looking up at Dizzy, “I think it looks good on me.”

 “I suspect it’ll look better in you, sis,” Gabbie replied in turn, beginning to stroke his length as Izzie ran her tongue up along the underside, all the way to the head.

“[Excuse me, girls?]” Dizzy began, raising his hand up in protest only for Gabbie to stand and take him by the wrist. She pressed her chest into his palm as she looked up at him with a smug grin. “You do want to participate in our experiment, yes?” 

He nodded slowly, before sending a ripple of small ridges down along the length of his shaft. He nodded a little more enthusiastically, teeth clicking softly as he felt Izzie’s tongue run a ring around the head of his tool. 

“[Yesssss,]” he groaned softly, only to feel Gabbie pat his chest.

 “Yes . . . Ma’am,” she corrected him with a grin as her sister took the head of his shaft into her mouth. 

He nodded again, this time much more eagerly, “[Yes, ma’am,]” he groaned as he filled Izzie’s mouth with bumps and ridges, doing what he could with his tool to entice her to take more of it in. He could feel the bumps against her tongue, as he rubbed against it with them, wondering silently if it was causing her as much pleasure as she was causing him at the moment. Her tongue massaged around and in between the pulsing, shifting bumps, teasing his head with it as his hot, slick precum began filling her mouth. 

Gabbies’ hands firmly grasped his member, encircling it as she began to stroke, coaxing more of the fluid out and into her sister’s mouth. More ridges grew out of his hot flesh, pressing up against her palms, rubbing against them as she squeezed and stroked his length.

The sensation around his shaft disappeared after a moment, though he’d closed his eyes by this point so it was a surprise that nearly knocked him off his feet when she pressed against his chest. 

“Lay back, stud. It’ll be more conducive for our work.” 

He nodded, letting out little more than a pleasured groan as his tool slid free of Izzie’s mouth with an audible pop. 

“Surprisingly refreshing,” she mused as she stood, removing the rest of her jumpsuit in the process. A thin drool of pre ran from the corner of her mouth and down her cheek, though Gabbie quickly took care of that. As her sister stood she leaned in, running her tongue up along the trickle of fluid. 

“Yes, surprising indeed,” she teased in reply as she helped her sister out of her suit. Dizzy watched the amorous display carefully as he eased himself onto his back, spreading his legs apart slightly as he continued to follow them with his eyes. Izzie knelt down between his legs, and he felt a moment of discomfort followed by relief as she managed to pull his massive, heavy sack out from within his suit, letting it hang between his legs as she massaged it and weighed it with her hands. 

“I think his balls are as big as our breasts, sis,” she muttered as her fingers gently dug into his fuzzy flesh. Gabrielle had been removing her own jumpsuit as she did this, and she tossed the garment across Dizzy’s face once it was off. By the time he managed to reach up and remove it, he noticed two things; first, the raw scent of arousal that lingered on the garment, and second, the sensation of a wet heat soaking into the fur of his chest. He tossed the suit aside to find Gabbie straddling his chest, her knees just barely far enough apart to reach either side of his massive body. Reaching down, she ran her fingers through his fur, leaning in to give his snout a tender kiss. 

“That’s a good boy,” she teased him, and he could feel Izzie stroking his member once again. Gabbie looked over her shoulder. 

“Is it gonna fit?” she asked, only for Izzie to giggle mirthfully in reply. “Does your arm fit?”

“With enough lube, I’m convinced anything will fit.”

“You’re just jealous I get to ride him first!”

Dizzy gasped and shuddered as he felt the thick head of his shaft quickly enveloped by the hot confines of Isabella’s sex. He had expected to split someone their size open with the sheer girth of his tool, but as the inches slid inside quickly he realized his fears were unfounded. As he began to send ripples of bumps and ridges through her tight canal, he was surprised that she did not respond in kind - the most control she seemed to have over her own sex was to clamp down tight on his tool when he felt she had bottomed out. 

Her hands were on his abdomen to steady herself as her feet found purchase either side of him. However, his attention quickly shifted to the hand on his muzzle as Gabbie gently, yet firmly guided him to look up at her. The view from below her massive chest was a wonderful sight, and he could just barely see those curious, odd-colored eyes peering over them at him. 

“I hope you don’t mind, I don’t have any peanut butter,” she teased, and he wasn’t about to ask what peanut butter was as she raised herself up. 

“You’ll just have to start licking for my sake,” she added, shuffling forward until she was straddling his head. He wrapped his massive hands around her waist, marveling at how soft and smooth her skin was as he began supporting some of her weight, pulling her in close enough that he could feel his own breath washing over her sex. 

The scent was back, and it was far stronger than it had been on the fabric of her jumpsuit. It filled his nostrils, an intoxicating aroma overpowering what other thoughts he might have had, the complaints that were hiding in the back of his mind, and any shred of doubt at what he was doing. He had to know what she tasted like.

His rough tongue was running along the length of her slit before he realized it was even out of his mouth, and the sounds she made from above him were encouragement enough to prompt him to continue. His own curiosity was quickly forgotten as it quickly became his goal to make that stream of soft moans and adorable mewls to continue. She reached down to begin scratching him between his ears, which only added to the desire to please as he began digging his tongue in deeper. As he felt Izzie to begin bouncing up and down on his shaft - slowly at first, then faster - another set of adorable, high-pitched moans filled the room. 

Gabriella gave him a tap on the head, a sign he took to mean to stop, and she quickly turned herself around to face her sister before pressing herself up against his muzzle again. Her arousal now was not only filling his nose with its scent, but also now soaking into his fur. He wondered for a moment his den-mates would think, before that was interrupted by the return of her sex to his lips. 

“Yes, fuck yes, just like that stud,” Gabriella moaned above him as he returned to lapping at her, before she leaned across him and planted a kiss on Isabella’s lips.

As her scent continued to fill his head with lust and her sister’s pace continued to increase, he felt his own climax rising within him. With a deep growl He reached up again, gripping Izzie’s hips and tugging her down on his tool firmly. She yelped suddenly as he began to flood her with his seed, his hips bucking up unbidden by the force of his orgasm - though only for a moment before, somehow, his shaft slid free of her overflowing sex, giving her sister a surprise facial in the process. Gabriella fell backward, startled by the sudden blast of seed that covered her face, chest, and part of her abdomen. 

The silence that followed was punctuated only by the heaving of chest and panting breath, and Dizzy’s guttural groan. 

It did not last long, as Izzie quickly began giggling, then laughing out loud, at her sister’s state. Gabriella quickly joined her, the light, mirthful sounds of their voices filling the room. As Dizzy glanced up and back at Gabbie, he couldn’t help but grin himself, though not for the same reason. Her body was covered with his pale, white seed, which contrasted beautifully with her dark skin. He hoped silently that these two would make a habit of these . . . experiments, and considered briefly whether he should recommend his den-mates for further . . . tests.

Dgrezrhg made an attempt to sit up, though he was stopped quickly by a pair of hands on his shoulders. “Nu-uh stud. You got another hole to fill first,” came Gabbie’s eager rebuke as she stood up. As she stepped over him, feet on either side of his head, she tugged one of her plush, supple cheeks aside to reveal a puckered ring of flesh, roughly the same color as the dark, prominent nipples that adorned her chest. 

“First test was volume, this one’s stamina,” she added, giving her own ass a firm slap and sending the soft flesh jiggling slightly. The display had him mesmerized, or else he might have sat up and buried his snout in her plush posterior. She turned to face him again as she straddled his thighs, her abdomen pushing up against his flagging member as she did so. He could feel her smooth skin, and the thick, sticky seed that still lingered there. Her hands took the top of his shaft, pressing it firmly against her toned, soft belly before beginning to stroke it. From the look of it, the tip of his tool was almost touching the underside of her mountainous chest as the ridges began to once again ripple across his blue, sensitive flesh, against her own efforts to stroke him.

He was already leaking pre again by the time Izzie moved to take up a position that caught him by surprise; she threw herself across his chest, laying with her belly and soft breasts resting against his fur, and her glistening, drooling slit close enough to brush up against his snout should he look down. He couldn’t help but do just that, the scent of their mixed arousal being a potent aroma that he was eager to get lost in. It wasn’t long before he was lost in the act of lapping at her messy, soaked sex, tongue digging into her aggressively with each long, eager lick. 

He was so enraptured with his task that he gasped and shoved his snout up against her when tight sensation of Gabbie easing herself down onto him finally registered. Izzie herself moaned in turn as he pressed his broad, wet nose inside her, the movement forcing her chest against his abdomen. 

As Dizzy drew his snout out from inside his former partner he watched in awe as Gabbie’s ass came to rest against his sheath, her slit just within reach of her sister’s head as he hilted inside her. The bulge in her abdomen was obscene, and he could feel a gout of pre drool from his tip empty itself deep inside her at just the thought of touching the core of her being. 

“Well, go on, keep licking,” Izzie stated rather expectantly, wiggling her hips enticingly as she did so. He dove back into her hot sex eagerly enough, though he glanced up from his work every so often to stare at the massive bulge in Gabbie as she began to work herself up and down slowly on his massive tool. It was clear she was relishing the sensation, from the way her sex was glistening and from the halting yelps of pleasure she let out each time she hilted him again. The second time he glanced up, he could see Izzie’s head bobbing and shifting between her sister’s legs, the aggressive bouncing of her golden hair giving testament to the eager attention she was giving. Gabbie soon had her fingers digging into Izzie’s hair, holding her head close as the rhythm of her hips became short and quick.

Before too long, he felt Gabbie tense up, grinding her sex against his fuzzy sheath as she let out a low, powerful groan. A thick gout of girlcum splattered against Izzie’s face and began soaking into his fur as she quivered around his thick tool. Her chest was heaving, its’ bountiful mounds bouncing slightly with each heavy breath, and though he wanted to reach up and squeeze each firmly with his powerful, clawed hands, they instead found purchase elsewhere - around her waist. He hadn’t climaxed yet, and the heat was taking control. 

She’d gotten him halfway, and he wasn’t about to stop now. 

Whatever protest she might have made died in her throat as he raised her up, before slamming her down again. His ridges became rigid fixtures on his tool as he ran her across them again and again, the sound of wet slapping of skin against matted fur filling the room. The heaving of his own chest was now pushing Izzie’s face into her sister’s pussy with each downstroke, and he continued to grind his tongue into her sex as he slowly pounded his way towards climax. He hardly noticed it when Izzie climaxed, spraying his face with her own arousal, as he was too focused on filling the human currently speared on his shaft with seed. 

When it finally did come, it came like a flood. 

His heavy sack felt like it was about to collapse in on itself the way it tensed up, and the volume of his first blast was almost too much for his tool to handle. He could see the shifting of his flesh under the bulge in her abdomen, which grew ever so slightly larger with each powerful spurt of seed that he pumped into her. After perhaps the longest climax he’d ever experienced, he could feel his hands go slack, his mind blank - save for the sensations of a sucking warmth, a spreading heat, and the quiet satisfaction of a job very well done. Gabriella soon managed to free him from within her, though her ass was left gaping, clenching and unclenching impulsively in search of the hot member now lost to it as she collapsed back onto his legs. Izzie remained where she was, herself exhausted by her own intense orgasms to Dizzy’s continual lapping.

It was some hours later when he found himself waking up again on the floor of the ‘examination’ room. His fur was still messy and matted in places, though the two wonderful researchers had disappeared. He sat up and found his clothes folded in a pile on the overhanging slab. As he began redressing, making sure all his belongings were there and intact, he noticed that he had another message. Opening it, he found that apparently he’d been scheduled for another session in what appeared to be an ‘extensive study’ of Dorarizin breeding habits. He chuckled to himself as he zipped his jumpsuit up again, before heading off to have himself a shower. Last thing he needed was to reek of human females - he wasn’t the only one of his kind in rut, after all.