Mail-Order Stud

A/N This story is about anthropomorphic animal characters. One character (Luis) is a trans man, and I use the words clit, cunt, and pussy to describe his genitals. Proceed as you wish.

It wasn't that Luis couldn't get a date or anything. He wasn't unattractive, as far as he knew. He was a short dog, mottled brown and black with a white strip down his chest, not quite fat but not quite skinny, and no one could even see his top surgery scars unless they were looking closely. But the idea of going out and seducing a stranger into fucking him for a week seemed... daunting, to say the least. So Luis turned to more professional methods.

He knew he didn't have a choice. Four heats without a partner had been a silicone hell. Faux dicks with inflatable knots just couldn't satisfy him anymore. He needed someone to help him through his heat. So he went to book a partner on the highest-rated place he could find.

"Daisy-Mae's Spunk & Stud Service-- For all your semen-related needs!"

The banner made Luis cringe when he opened the website. A busty cow almost bursting out of her overalls--presumably Daisy-Mae herself--gestured toward the wide variety of services available. There were five tabs to choose from: Studs, Sperm Bank, Surrogates, Heat-Mates, and Rut-Mates. There was even a little Shop link advertising sperm-boosting supplements and heat enhancers. They really did have everything.

Luis selected Heat-Mates, because he had no interest in getting pregnant this time around. There were guys of all species, but he filtered specifically for canine. No way could he fit a horse in him, even in the height of his cycle.

Daisy-Mae sure knew how to pick her studs. As he scrolled through the pictures of men showing off their cocks and knots, his groin started to flare with heat. He grimaced. He should have done this sooner, so he wouldn't be so distracted.

Luis found a few men to his liking, but only one dog really caught his eye. Rosco was a big Rottweiler; 6'3 and broad in every sense of the word. Wide shoulders, fat belly, and a girthy cock like none Luis had ever seen before. The profile said he was sterile, with a clean bill of health, so there was no need to use condoms.

He only had to imagine taking that thick knot for a few seconds before he clicked "Book."

He filled out a series of questions asking about his sexual health, identity, and preferences in bed. It was strange entering his personal information alongside these sorts of answers. After answering all the questions and waiting for the background check to clear, Luis had secured his Heat-Mate. Rosco would be coming next week, at first estimated day of his heat.

In the meantime, he fussed. He washed all of his sheets, then worried they might not be clean enough for Rosco by the time he came over, so he washed them again the day before. Then he realized he had forgotten to stock enough snacks for the upcoming week of activities. It was an equally embarrassing trip to the store with his cunt dripping into a liner the whole time. He didn't look the cashier in the face as he bought ten boxes of energy bars and recovery foods, no doubt stinking of pre-heat.

He went into heat a day early, and it was almost impossible not to pull out that fake dick and ride it until his legs couldn't hold him. But he waited, because he wanted to get the full experience.

When the day finally came, he was almost too horny to be nervous. His heat was in full-swing, and he hadn't even gotten dressed by the time he heard a knock on the door. Luis had spent most of the morning fingering himself. He'd gotten off only twice, practically nothing to his needy body.

He quickly pulled on his bathrobe, wiping his wet fingers off on the fabric, and opened the door. Rosco was standing on the other side, all six feet of his muscular black and tan body. He wasn't naked yet, which while disappointing made sense, but his t-shirt and shorts were tight around his body and left nothing to the imagination.

"Hello," Luis squeaked. He'd almost forgotten just how big of a dog he'd asked for.

"Luis Connors, I presume?"

"Uh, yes. Please, come on in!" He ducked out of the way to let Rosco enter. It was hard not to stare at the bulge in the man's shorts.

"I'm sure you know, but my name is Rosco," he introduced himself, holding out his hand. Luis shook it, only registering after that his fingers still smelled like pussy. His eyes widened, and he hoped Rosco wouldn't notice.

"So you paid for a week-long session, and I believe this is your first heat with a partner, yes?"

"Yeah, I've never um-- okay well I've had sex but never during my-- You know. I didn't want to risk it." Luis was starting to fumble.

"No worries, I've been a lot of peoples' first heat partner," Rosco smiled, in a way that made Luis relax but also deeply turned him on. He wanted to drop the robe and present immediately. Instead, he nodded and fiddled with the belt of the robe, looking at his hands rather than the thick thighs encased in Rosco's shorts.

"I'd like to know your limits, what you're into, and any concerns before we get started. I can tell that you're already," Rosco took a deep breath, "ready for me." The smaller dog just about came in his metaphorical pants. His tail was wagging hard, and if it wasn't for the fur, his face would be bright red.

"Oh right, uh... No limits, I think? But I'll let you know. I've mostly just used my knotted dildo to get me through heats, but well, that isn't doing much." It felt almost freeing to talk about this sort of thing. Rosco only tilted his head, brow raising.

"And, well I'll be honest, I really really want you in me. I saw your pictures and I--"

Rosco cut him off by swooping in, his big hands gripping the robe like he wanted to tear it off of Luis. Luis wanted nothing more than for him to do just that.

"I know what you need," he growled, a primal sound from deep in his chest. Luis could feel a bulge against his thigh. He looked down to see Rosco's shorts were stretched taut.

"Oh- oh," Luis whispered, suddenly light-headed. He needed this man inside him.

He untied the belt and let the robe fall open, leaning against the back of the sofa. Rosco seemed to drink in the sight of him. He looked hungry.

"No limits, you said?" Rosco began to sink down to his knees, and Luis barely had time to string together a coherent thought before he realized the man was nosing at his cunt.

"No limits," he said.

Rosco spread his thighs and licked a broad stripe between them. Luis's head dropped back and he let out a weak noise of surprise and pleasure. He was so wet, and Rosco only made him wetter with each pass of his tongue. He was thorough, digging in every fold and hidden place to taste everything Luis had to offer.

Feeling another dog's tongue wrap around his clit-- however small it may be-- was like heaven on earth. Luis had to grab Rosco's head to keep from falling backward. He rutted into the rough sensation.

"Oh, fuck," Luis cried out. He throbbed, no doubt wetter than before as Rosco slurped him down. His tongue even delved into Luis's pussy, tasting the sweetness within. He'd never been eaten out like this before.

His orgasm hit before he even registered it. He held Rosco tight to his cunt, hips trembling as he wanted more, more, more. He'd made a mess of the dog's muzzle, but Rosco didn't seem to care. When he finally pulled back, he was licking his lips like he'd just even a delicious meal.

"I can tell we're going to have a lot of fun together. Now bend over that couch for me so I can give you that knot you've been craving." As Rosco stood to tower above him once more, he unbuttoned his shorts and let them fall to the floor. His sheath and balls were tight with arousal, and his cock was fully erect.

"Okay," Luis said dumbly, his voice still shaky. He turned around and put his ass in the air, shivering when he felt Rosco's thick cock rub between his furry cheeks.

"You poor thing, suffering on a silicone knot for so long. I'll show you how a real knot feels, how satisfying it is. Your body is begging me for it," he said again in that deep growl that made Luis feel tiny and powerless in the best way.

Rosco lined up the tip with Luis's entrance and gave a few experimental thrusts. They both groaned when he slid in easily. Luis's whole body went tense as he tried not to cum immediately.

"Careful now, doll. You're gonna push me out if you keep squeezing so hard. Just relax and let yourself enjoy it."

He felt big hands wrap around his waist, fingers and thumbs almost touching, and pull him back. Luis mewled with need as he was filled even more. He was so close, it felt so good, but it still wasn't enough. Rosco would satisfy him, though. Rosco pushed in inch by agonizing inch until he was buried in to the hilt. The fur of his sheath rubbed the lips of Luis's cunt.

Luis came again with a shameful squeal and full-body tremble, his toes clawing at the carpet below.

"See how much better it is already? You need this big dog cock to satisfy you properly. Imagine how hard you'll cum when I knot this tight hole," Rosco cooed. He pulled out just enough to make Luis whine, then slid back in slowly.

"Rosco-- OH! Oh god, that's... Nngh," he couldn't even string together a sentence, the sheer sensation too much for him. He grit his teeth against the waves of intense pleasure.

"I know, you feel so good, doll," Rosco said.

Then he began to fuck him in earnest. He put his whole weight into the force of his thrusts, slapping their hips together with muted claps that filled the living room. All Luis could do was hold on and take it.

It was incredible.

Rosco seemed to be enjoying it too, if his heavy grunting and panting were anything to go by. He kept his pace steady all the while. His cock speared Luis open over and over, rubbing hot and firm against his g-spot.

Luis arched his back, almost howling with the pleasure of it all. He felt like a wild animal, nothing more than the primal urge to get fucked by this hot mountain of a man. He didn't even register the knot starting to inflate until it caught on his entrance. The feeling made his eyes roll back and his mouth fall open.

"You want my knot?"

"Yes!"

"Beg for it, doll. How much do you really want it?" Rosco pulled out and teased him by pushing in just to the edge of his flaring knot.

"Fuck, I want it so bad. I need it. I need it so bad, Rosco," Luis whined. His hole clenched with an overwhelming need. In all his heats, he'd never wanted something so much.

The dog seemed to accept that answer, because he pushed in to the base again and began rutting in short, hard strokes. The growing base of his cock was firm within Luis's cunt, a delicious reminder that they would be locked together soon. Rosco would knot him and fill him up.

At full size, his knot had to be the size of a softball. It stuck tight inside Luis and that was the beginning of the end. His toes curled and his hole clenched around the knot, throbbing around its girth as he pushed back into it.

Rosco snarled his orgasm into Luis's back, his cock pulsing. Luis felt every pump of his hot cum deep inside. It was intense, the sheer pressure and the humid heat of it all. His hole was sloppy wet, dripping with Rosco's spit, his own slick, and now the first of many loads. Rosco didn't stop rutting his hips until he'd filled up Luis with every last drop.

Luis was still trembling with the aftershocks when Rosco picked him up by the chest and moved them onto the couch. How he managed to do it without tugging too hard on the knot was nothing short of a miracle, but they managed to settle with Luis on top and Rosco staring up at him.

"How was your first real knot?"

"It was, hffuck, incredible," he slurred. Luis couldn't help but roll his hips. If he was going to be stuck for a while, why not take advantage of being stuck to an enormous, hot man? Satisfying as it was, their first round had done little to abate his heat. Rosco groaned and took hold of his hips again.

"Oh you're a needy little thing, aren't you? Gonna ride my knot until you cum again? Go on, ride me," Rosco said with a small pat on the ass. He guided Luis's hips up and down, only pulling enough to make Luis gasp and whine when his entrance stretched out. He was still so needy.

The smaller dog was already shaking with the effort, but it didn't stop him from pushing down hard when their hips came together again, sucking his cock deeper in.

"Yeah that's it, baby," Rosco said with a rough thrust. One hand reached around to feel Luis's clit, rubbing the sensitive bud between two fingers until he was throbbing and mewling. They rolled their hips together over and over, making soft slick sounds as they did.

The Rottweiler drew yet another orgasm from his soft, used pussy. He was starting to feel the effects of sex wearing on him, but his body still begged for more. More. Always more. He got even needier when he felt Rosco's cock start to soften.

The dog slipped out with ease a few minutes later, his cum spilling out in a lazy stream after it.

"Don't look so sad, doll. I'll be ready for round two as soon as you finish up a cup of water." Rosco extricated himself from underneath Luis and left the smaller man to finger his stretched out, sloppy hole, ass-up on the couch.

"Mmkay," Luis said. He wasn't paying too much attention to the details beyond "Round Two," so was surprised when Rosco set a glass on the table in front of him.

He was reluctant to sit up, more laziness than the mess he was currently making on the couch. With some coaxing, Rosco got him to down the water. He realized he was parched, and so gladly accepted another when offered, and then a third.

"It takes a lot out of you," Rosco said once he'd finished rehydrating himself.

"Mm, you can give me plenty of fluids," Luis said. Distantly, he thought to be embarrassed by the boldness, but his heat was already burning in his loins again. He needed Rosco like he needed water.

"Is that so?" Rosco's raised brow and grin made his heart race. The man had taken off his shirt before sitting on the couch again, and so Luis could see his entire body now. He wondered what it might be like to rub against that belly. Even more so, he wondered how fast Rosco might recover for them to go again.

His cock hadn't retreated into its sheath. The knot was nearly deflated now, but he was at half-mast once more and seemed to be steadily growing.

"How about we take this somewhere with a little more room?" The suggestion reminded Luis that he in fact had a bedroom, and a king sized bed with fresh sheets ready to be made filthy.

"Okay," he agreed.

Rosco followed him down the hall to the second door past the kitchen, where his bed lay in wait.

Luis didn't even have time to lay on the bed before Rosco was on him again. Rosco pinned him to the mattress, both of Luis's arms in one hand while the other spread his legs. His muzzle was everywhere, licking the sex sweat and musk from his neck and shoulders. His hard dick was once again sliding between Luis's lips, begging entrance. He slid in so easy, it would have made Luis feel slutty if he had the mental energy to even think about that. Instead he was thinking about how good it felt to be filled up again.

Rosco ghosted his teeth against Luis's neck, the threat of his big jaws enough to keep the dog from moving while he took hold of his waist and made short work of him. He was a machine, hips fucking hard and precise exactly where Luis needed him. His tongue laved hot over Luis's throat.

He could produce nothing more than desperate noises. His throat was raw but he kept crying out for more.

"Ah ah ah," he squeaked against the Rottweiler's forehead. He could feel the knot this time, slowly inflating and threatening to trap another fat load of cum inside of him. He wanted it more than anything.

"That's it. That's it. Fucking take it. You're such a needy heatslut, begging for my knot," Rosco said, his voice rough. Luis cried out wordlessly in agreement. He could feel the snarl bubbling in Rosco's chest through his whole body

"Rosco, oh go-od Rosco! I- I-," he broke off into a howl of ecstasy as he felt the man's knot catch. His pussy throbbed around the huge bulge, and it pushed against all the right places deep inside him. His clit was being rubbed over and over by the dog's sheath, on the edge of uncomfortable, but it was enough to make him writhe. He couldn't think beyond yes, fuck, MORE!

He clamped down on the knot as yet another wave of overwhelming pleasure washed over him. He was so sensitive, inside and out, and every inch of him was shaking from just how good it felt.

The dog could barely move inside him, between the knot and how tight he was squeezing, but Rosco ground his hips in deep regardless. It drove Luis crazy, feeling the knot shift in him. The real thing was so much better, how hot and firm it was. And when Rosco pinned and fucked him like a beast through his own orgasm, the feeling of taking another load made him cum so hard he saw stars.

After the initial intensity passed, Rosco lifted himself up and took Luis by the thighs, spreading him open to keep rutting his knot against the smaller man's sensitive walls. He was still cumming, each roll of his hips accompanied by his cock throbbing and shooting another pulse of seed into him.

God what Luis wouldn't give to have this man really breed him.

He even paid attention to Luis's overstimulated clit, toying with it with his thumb.

"Fuuuck," Luis cried out as he came yet again. He was so wet with slick and he could feel the cum sloshing around inside his cunt, threatening to leak out around the knot.

"That's it, doll," Rosco said. He was panting with exertion, his muscular chest heaving.

They lay like that for a while, Rosco making him cum over and over until he was in tears. Rosco's body was reacting to his heat in the air, and the knot stuck even longer than before.

Then it slid out and Luis whined at the loss.

"Sorry, but we gotta get some water in you. You're going to get a headache," Rosco apologized half-heartedly, though he did slip two fingers inside Luis to feel how stretched out he was from the knot. His fingers stroked his inner walls and made him gasp and stiffen up, but he didn't know if he had the energy for another orgasm.

"I'll be right back."

Rosco left him alone in the room. It was enough time for Luis to find out he could fit four of his own fingers in his loose pussy. Then he realized he'd covered his hand in Rosco's cum and brought it tentatively to his mouth. He wasn't even ashamed to be found lapping the man's salty load from his fingers like it was the best taste in the world.

"How about some water instead?"

Luis took the proffered glass and chugged it. His throat had gone dry from making so much noise. The water soothed it some, but he knew he'd be mute by the end of the week. At least, if Rosco kept fucking him like this, he would.

"Mm, thank you," he sighed, licking his chops as he handed it back.

"You're welcome. Now that we've gotten that out of the way, let's talk about the rest of this week. Do you wish to continue using my services for your heat?" Rosco was wearing a grin on his face that said he knew exactly what Luis's answer would be. It was just a formality. Luis knew his answer too.

"Oh my god, yes."