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.
