FSE

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"Is this really necessary?" asked Volga as the last ropes were tied into place.

"Afraid so," replied Lambert. "Keeping you from moving around will help me test the potions effectiveness."

Volga sighed, trying his best to get comfortable. He was on his knees, his calves tied to his thighs and his forearms bound securely behind his back. Lambert had even looped it all together to make sure the husky stayed still. When it came to testing his creations the fox appeared to be a bit of a control freak.

"I still can't believe I have to do this," grumbled Volga.

"Then next time you agree to a bet make sure you win," said Lambert, pulling a cork out of a flask filled with a bright pink potion. "Now open up."

Volga rolled his eyes but did as he was told, letting the fox tip the potion into his mouth before swallowing it. Amazingly for a new potion it actually tasted alright. Lambert set the flask aside and moved to kneel before the husky.

"So, how long until whatever that was kicks in?" asked Volga.

"Shouldn't be long," replied the fox. "But I think I know a way to speed things up."

The fox reached forward and started running his hands through the plush fur of the husky's chest and belly. The husky was wearing only his brown loincloth, leaving the rest of his body exposed to the increasingly hungry gaze of the fox.

"What are you doing?" asked Volga. He could feel a warmth spreading from where Lambert was touching him.

"Just checking to make sure my new mixture is working. Are you feeling this more than normal?"

"Yes, I uh... I am."

"Excellent," said Lambert. The fox grinned deviously. "How about this?"

Lambert leaned forward and started kissing his way across the husky's collarbone and down his chest.

"L-Lambert! What are you -- aahhh!"

The husky gasped when the fox latched onto one of his nipples, licking and biting at it while the dog squirmed. Something like that had never felt so intense to Volga before; every swipe of that hot vulpine tongue sent shivers down his spine. His eyes went wide when he also started to feel a tingling between his legs.

"What the hell did you give me?!" exclaimed Volga.

"Oh, that?" said Lambert, moving across Volga's chest, biting playfully at his other nipple. "Just a little concoction I came up with. It's designed to target and enhance pleasure and sensitivity to the subject's erogenous zones."

It took Volga a couple seconds to process the fox's words, but when he did he was ready to throttle Lambert.

"You gave me an arousal potion!?"

"More or less."

"You son of a bi--mmphf!"

Volga's snarled insult turned to a moan when Lambert's hand slid down his front and grabbed him through his loincloth, slowly working the husky's length. It only took a few strokes to have the dog at full erection, tenting his loincloth as a large wet spot started to form in the fabric. Volga tried to get free of the ropes, but Lambert had done too good of a job securing him. All he could do was try to pull away from his teasing fingers or that infuriatingly warm tongue licking at his chest.

Lambert gave the husky's cock a firm squeeze before pulling away from him. "There. Now that the potion has taken affect, we can move on to stage two."

"The fuck is stage two!?" asked Volga.

"Why, increased stimulation to primary erogenous zones," said Lambert.

"Wh...What the fuck does that mean?"

Lambert smirked in that way only foxes could.

"I'm going to suck your dick."

And with that he tore the husky's loincloth off of him, letting his cock spring out to stand proudly between his thighs, the thick length dripping and eager for attention. Walking around behind the husky and ignoring his angry complaints and threats to untie him, Lambert clipped a hook to the ropes holding Volga in place and used the sturdy rigging mounted to the ceiling of his lab to raise the dog into the air. He stopped once Volga was a couple feet off the floor, the dog's angry thrashing making him sway, his throbbing dick dripping onto the floor.

"There, all set," said Lambert, securing the rigging and walking over to his work bench. "Now be a good boy and let the potion do its thing while I finish getting ready."

Volga's draw dropped as Lambert started to get undressed.

"Why the hell are you getting naked?"

"Three reasons. One - it's not fair that you're the only one that gets to be naked." Lambert shrugged off his coat and kicked off his boots. "Two - it's my lab and I can do what I want." He pulled off his shirt, smoothing down the ruffled fur on his chest. "And three - I don't want your cum getting on my clothes."

Lambert dropped his pants and stepped out of them, posing for a moment to let the husky enjoy the sight of his naked body. The rich brown fur that stretched to his elbows and from his feet to halfway up his thighs contrasted nicely with the rest of his russet fur. He ran his hands through the thick ruff of fur around his neck and down his body, giving his erection a few gentle strokes.

"Ask me nicely and maybe later I'll thank you properly for being my little guinea pig." Lambert reached around and squeezed his ass. "I think I know what you'll like. But for now..." He got down on his knees and moved under Volga, the husky grunting when he felt the fox squeeze his cock. "... time to have some fun. Let's move onto stage two."

Volga moaned loudly as Lambert leaned forward and closed is mouth around the husky's cock, swallowing him down to the root and running his tongue hungrily along the length of his shaft.

"Oh my gaaawwww!"

Volga had never felt a blowjob so intense before. Every little move of the fox's lips along his cock felt like it was going to make him cum, to say nothing of how his toes curled when Lambert's tongue pressed firmly against the head of his cock and started running firmly around the rim. The husky was leaking so heavily the fox was having to swallow around him constantly, which only made the stimulation that much more intense.

"Holy fuck! L-Laaambert! G-get off me!"

The fox slowly pulled back, his tail wagging furiously over his rear, proof to Volga how much Lambert was enjoying this.

"What's the problem? Didn't that feel good?" Lambert gave Volga's dick a gentle squeeze, and the husky tried to thrust down to meet his fingers as much as the ropes would allow. "Seems to me you're enjoying yourself."

"Of course it felt good, but that damn potion you gave me is making it too mu-AAAH!"

He cried out at the feeling of the fox's tongue starting to lap at his penis. Rather than sucking him properly, that hot vulpine tongue was tasting spots at random, making sure to gather his pre as well.

"W-Why a-AAAH-are you doing this to m-meee?"

Volga whined loudly as Lambert nursed on the head of his dick for a few moments before pulling away, continuing to stroke the dog's cock as he spoke.

"For my research, of course. Though I'd be lying if I said it wasn't also because I enjoy this. And you know, there is a way to make this a bit more manageable for you."

"And what might that be?"

"I could make you cum."

Volga thrust down towards him, his body desperate for some relief.

"Then do it already you damn fox! This is driving me crazy!"

"Good to know," said Lambert. "But I hardly think it's fair that you'd be the only one getting off. If you really want to cum that badly, there's something you'll have to do first."

"...And what would that be?"

"Simple," replied Lambert. He leaned forward and swallowed Volga's cock again, gulping and licking a few times before pulling away and getting to his feet, smiling at the way the bound husky panted and struggled. Walking around slowly behind him, the fox rested his hands on the husky's ass. "Just raise your tail like a good little bitch, and then we can both get what we want."

Volga couldn't tell if the heat in his face was from arousal or anger.

"Are you fucking kidding me!? This whole thing was just your twisted way of getting me in bed!?"

"Obviously," Lambert smirked. "Really Volga, I would have thought that was apparent from the beginning. But if you really don't want me to fuck you, we can just continue the experiment. Though I should warn you--" Lambert popped two fingers into his mouth, getting them good and slick "-- your cock isn't the only thing that's been made more sensitive."

Volga yelped when he felt Lambert's fingers against his tailhole, slowly working their way inside the squirming husky. For a bit of extra stimulation, Lambert used his other hand to stroke down the dog's perineum and over his balls before working back up.

And then his fingers found Volga's prostate.

All it took was one little stroke of those fingers to have the husky seeing stars, his cock throbbing hard and shoot a line of precum across the floor. Volga pulled against the ropes as hard as he could, determined to grab his cock and jerk himself to the blissful relief of orgasm. But the knots held strong; he wasn't getting out of them until the fox let him out.

"Lambert...pleeeeease," whined Volga, his hips thrashing against the ropes. Even he couldn't say if he was trying to pull away from those teasing fingers or to push them deeper under his tail.

"You know what I want to hear," said the fox, hefting the husky's balls and stroking them with a thumb. "Just tell me what we both know you want, what you need..."

Volga's face was burning with embarrassment, but the potion had made him so sensitive he couldn't take all this teasing. He needed to get off, whatever it took.

Swallowing his pride, Volga looked back at the fox.

"Fuck me."

Lambert looked up at him. "So sorry, Volga, I didn't quite catch that. I was too distracted by this beautiful body of yours." He pressed his fingers firmly against the dog's prostate, making him wail in need. "What did you say?"

Volga thought he was going to go made if he didn't get some relief, soon. Hiking his tail up to expose his ass, he yelled, "JUST FUCK ME ALREADY!"

Lambert grinned that foxy grin, his fingers sliding out of Volga only for the heat of his cock to replace them, pressing firmly against the husky's tailhole.

"Good boy. Now to stage three."

Lambert thrust forward, hilting himself inside Volga in one go. It was hardly the dog's first time, so he knew Volga could take it. And besides, that hot, tight tailhole just felt so damn good wrapped around his dick. Right where it was supposed to be. Lambert didn't waste any time with going slow. He immediately started to fuck the bound dog with all the strength his hips cold muster, moaning happily at the bat Volga was moaning and whining at having his ass fuck so hard.

As humiliating as this situation was, Volga was in heaven. The potion had made his body so very sensitive that every thrust inside him felt almost as good as a regular orgasm. And when the fox's cock started ramming into his prostate, Volga was whining and moaning like the world's neediest bitch; he'd never felt anything so intense before.

"Good dog," said Lambert, squeezing Volga's ass. "I knew this was what you needed. All it took was a little alchemical help to get you there. How does it feel?"

"Unff... ugh.. f-fuck..."

Lambert laughed. "Glad you're enjoying yourself; I know I am. This ass of yours is absolute perfection. Let me show you how much I appreciate you being my little lab assistant."

Lambert reached under Volga and grabbed his cock, jerking the husky swiftly while angling his hips to hammer the dog's prostate. It was all too much for Volga; his eyes rolled back in his head as he came, howling loudly while he painted the floor with his cum. His ass was clenching and spasming around Lambert's dick, making that vulpine penis feel even bigger than it was. Volga had just enough awareness left to feel the warmth spreading within him when Lambert came, pumping his load deep inside the husky before hilting himself, keeping that tight, clenching ass milking his dick.

But as his orgasm started to die down, Volga began to whine and struggle once again; Lambert's hand wasn't leaving his cock. In fact, Volga's dick felt even harder than it had before he'd cum.

"Wh-what did you do to me?" he whined, gasping as the pleasure started building again, his cock even more sensitive than before.

"Oh, that. There's one other aspect of my potion I forgot to mention. It exponentially increases the drinkers sexual stamina."

"Y-You mean...!?"

Lambert grinned wickedly. "That's right, pup. You'll need to cum several more times at least before the potion will work its way out of your system. Luckily for you, I've got the rest of the day free, so you and I have more than enough time to have our fun."

He started thrusting again, making Volga swinging with the power he was putting behind his hips. The husky's pleasure built quickly, he cock already aching for more attention, even as the fox's next words made his tailhole clench around that thrusting length.

"This time, let's see how it you react when I knot you. It'll be an important note for my research... and maybe later I'll let you see how I take yours."