"Hi! Welcome to ReproLabs, how can I help you?"

Pale, lilac breasts strain against an altogether too tight-fitting lab coat, and my vivid pink eyes look attentively at the man before me, taking in every detail and filing them away for later as he steps up to the reception desk. My short, black hair is swept back into a sweet bun, thereby exposing the two small horns that jut from my forehead like a pair of diminutive antlers, and my mouth flashes the barest hint of tiny fangs as I smile, while my spade-tipped tail flicks back and forth in a slow, contented motion. The man looks at me, clearly used to the sight of a succubus such as myself, but perhaps slightly nervous by what he has come here to do. After all, while succubi have fast become a mainstay of the modern world since the Planar Shift, there's still a lot of superstition about us and what we do. Still, he is here, and that alone is reason enough to smile.

"I'm here for the two o'clock?" His voice is slightly nervous, but I simply nod and smile in return, and sweep my hand out to gesture towards a door on my left.

"Of course, Sir. This way, please."

I lead the way down the hall, taking care to let my hips sway and wag with every step so that he has something to look at, and soon we step into a small, sparsely-furnished room, barely more than a glorified cupboard in a line of similar cupboards. In one corner stands a comfortable chair, while a table next to it carries a few glossy magazines, a tablet branded with the ReproLabs logo, and a box of tissues. Beneath the table sits a shoebox-sized black crate with a lid. I step inside and gesture towards the chair with yet another smile.

"You are free to sit here, Sir, if you want. Standing is allowed as well, of course. There's a few magazines and some electronic entertainment should you desire it, and the box underneath is for any additional needs you might have, in terms of accessories to make your experience more pleasant."

He looks around, cautiously, and then steps up, shrugs off his jacket and lets his gaze wander over the contents of the table. I stand and wait with a pleasant smile as he inspects his surroundings and tries to build up the nerve to ask the same question that all the first-timers ask. It's always a little bit amusing to watch them struggle with the words, even if I also can't help but feel a little bad for them. It's only fair to be nervous, after all.

"I'd heard," he finally says, after a lengthy pause wherein he has feigned interest in the cover of the topmost magazine, "that it might be possible to get some, ah, help with it..? Like, you might--"

I nod and smile, cutting him off as I push my chest forward a little bit, until the topmost button of my labcoat is threatening to pop right off.

"That's right, Sir; aside from the things provided here, each and every one of the lab assistants here would be happy to help you along, should you desire it. If you'd like, I can help you out myself, or I can bring in a few of my colleagues so you can browse..?"

His eyes go wide, and he stammers a few times as he shakes his head. "N-no, no, that won't be-- I mean, you're perfectly fine, I couldn't possibly--"

His words die in an embarrassed sputter, but his eyes are glued to my sizable chest, and in return I offer him a reassuring smile and a better view as I reach up and pop the buttons of my lab coat, one by one, until it sloughs off my body to reveal my lithe, naked form underneath. Only a pair of black panties covers the most intimate bits, but everything else, from my firm, round breasts to the voluptuous curve of my waist, hips and thighs, is on plain display for him. After a moment of letting him gawk, I turn around and push the door shut behind us.

"Don't worry, Sir," I croon as I turn back to him, "there's nothing to be ashamed of. You are here to perform a valuable task that could spell a lot of happiness for a lucky couple somewhere, but who says you're not allowed to enjoy it in the meantime? I promise I'll take good care of you."

I give him a wink, and he turns slightly red around the ears, but he says nothing, and simply begins to fumble with his belt and trousers, while I slowly go down on my knees before him.

"Do you prefer to stand or sit, Sir?" I ask, glancing up at him with my luminous eyes while his trousers fall down around his ankles. He groans softly, the outline of his hard cock straining against his boxer-briefs, and then he croaks a hoarse reply, evidently too preoccupied with the sight of me to really spare much effort to his words. "I'll stand."

"Alright." I smile and turn my gaze back to his cock, which is now coming into view as my fingers hook around the waistband of his underwear to tug them down. "Feel free to peruse the provided material, Sir, while I take care of things down here. Oh, and if you need anything more, please check the box under the table. There's most things you might desire; cuffs, a blindfold, buttplugs of various size, lubricant..."

He grunts in response, but does not make a move to grab the box, and so I return my attention to the matter at hand, namely wrapping my slender fingers around his twitching cock and guiding it up to my lips. As soon as I am within range, I part my lips and stick out my long, flexible tongue, which licks dexterously across the underside of his head before wrapping entirely around his girth and guiding him as surely as anything into my waiting mouth. His taste is salty, musky and tinged with the scent of the soap he has been using, and I give a soft moan before opening wide and pushing my mouth down around him. In one, quick swoop I swallow half of his length and press him up against my throat's opening, and I hear him curse and gasp above me as pleasure begins to rock through him.

To say that all succubi love sucking cock is like saying that all Asians eat rice; while there might be a grain of truth in it, it does not hold for everyone, and as far as generalizations go, it's probably best to not make any assumptions. I, however, am a fiendish mouth-slut, and no sooner have I wrapped my lips and tongue around his thick cock, and begun to suck on him like a lollipop, than I am moaning, squirming and breathing hard around him, and perhaps he notices my excitement, because I feel him twitch in my mouth and leak a dollop of precum onto my tongue, while his hands come down to grab either side of my head and hold me tightly against him.

"Fuck," he growls, and I moan an incoherent syllable in return in the moment before he hefts my head, pulls it back until several inches of his glistening cock is exposed to the air, and then pushes back in with the selfish eagerness of the terminally aroused. As he begins to pump back and forth, I allow myself to go limp and pliable in his grip, and soon he is fucking my mouth slowly and firmly, and drawing a series of wet, squelching slurps and moans from my mouth. I can hear him pant above me, and with every slide of his cock I press my lips together and grind my tongue against every part of him that I can find, while thick strands of drool begin to spill over the rim of my lips and slop down across my lilac chin and neck. He is fucking me faster, more eagerly, and suddenly he pushes forward with a newfound recklessness, and forces his entire length down my throat, until my nose is buried in his pubes and the taste of him is ground into every pore of my fiendish tongue.

Whoever designed my kind probably realized very early on that each and every one of our holes was going to be put to use fitting thick, hard cocks inside them, and so we were never burdened with a gag reflex like our human sisters. Perhaps this is what takes him by surprise, when his aggressive push forward elicits nothing but an excited, muffled moan and a wet schluurk from my throat as it wraps around him. He certainly unleashes a soft string of expletives and pulls back almost as quickly as he pushed inside, but then our eyes meet, my pink orbs gazing up at him with the hint of an encouraging smile, and I watch his face contort into a mask of dominant glee as he reaches up, grabs me by the horns and forcibly pulls me back onto his cock, this time simply pushing inside and laying into me as if my throat was the most exquisite and receptive pussy he had ever fucked. Hard, firm and uncompromising in his thrusts, I feel my throat flex and ripple around him as he hammers himself home, and the sheer cacophony of wet sounds that erupt from my throat is enough that anyone standing outside the door is probably able to hear every ball-slapping thrust that he lays into me. Meanwhile, I can feel my neglected cunt pulsing and dripping arousal into my panties, and I clench the tiny plastic cup that I retrieved from my lab coat in my hand while relishing the sensation of a fat, needy cock selfishly fucking my throat with reckless abandon.

No good things last forever, unfortunately, and I feel him suddenly tense and buck harder, his fingers holding a claw-like grip on my horns as he goes for broke between my lips. The firm tensing of his legs tells me that he is about to blow, and in the last second I force myself back, pulling his cock from my throat and laying it across my flattened tongue just in time for his first rope of cum to explode across the roof of my mouth. Gasping, growling, almost crying with pleasure, he clings to my head and pumps himself back and forth, grinding his head and the pulsing, jerking cum vein against my lower lip while jet after jet of pearly white cum fills my mouth. Finally, I feel his flow stop, and he pulls out, smearing a bit of spunk over my lips before staggering back and falling into the chair with a heavy sigh. Meanwhile, I hold up the plastic container, and carefully open my mouth to let the warm cum pour out and gather in the container. His was a generous donation, and by the time I am done drooling the fruits of his labor into the cup, it is more than half full, with little bubbles forming on the surface from the demonic spit mixed in. I carefully cap it and set it aside, before crawling on my hands and knees over to kiss and lick his softening cock.

"Won't... won't your spit ruin it?" His voice is weak, but that might be because I am nursing the tip of his cock between my lips. In response, I pop my lips off of him and smile.

"No, actually; studies have found that certain para-angelic fluids, such as our spit, actually help empower the fertility of human sperm, and makes for a higher chance of successful conception. That's not to say that it is automatically better to use sperm harvested by a succubus, but it might explain why our success rates, and customer satisfaction numbers, are higher than those of our immediate competitors."

Already I am back in my professional mode, and I reach over and pick up my lab coat and the plastic container of cum before standing and getting dressed. The man likewise stands and buttons up his jeans, and soon enough we are standing back in the lobby, my left hand cradling his pearlescent donation in my pocket while my right shakes his. I offer him a smile.

"Thank you for your contribution, Sir. We have your information on file, and you will receive your payment within four to six business days. I hope you will come back and make another donation in the near future."

For a moment, it is as if he had forgotten that he was actually doing this for money, and not simply as a means of getting off, but he quickly recovers, smiles back and shakes my hand before sauntering out the door with a certain spring in his step. Once he's gone, I return to the reception desk, punch a few numbers into the computer and hand the container of sperm to another succubus passing by. She walks off to file it, and I settle back into my chair, lick my lips and smack them with evident relish. That was fun! I wonder who's next through the door.

I don't have to wait long. At 2:26, the doors open again, and I perk up. Looks like my two-thirty is early.

"Hi!" I rise, and walk over to you. My hand is warm, slender, and perfectly shaped to wrap around your cock. "Welcome to ReproLabs. How may I help you..?"