Beck's smirk lingered as he let his mousey senses gradually pick up on every scent. His nose twitched as he took in the faint whiff of mint and clean linen that had become the apartment's signature scent. But beneath that, something more potent lurked. His whiskers quivered with anticipation, his heart skipping a beat as he recognized the musky, earthy but foul scent that was unique to Phin's.

He approached the living room, his eyes locking onto Phin's swollen diaper. "Well, it seems you've been busy," Beck said, his voice thick with amusement. Phin's cheeks flushed an even deeper shade of red, his eyes dropping to the floor. The silence was thick with tension, the kind that only comes from sharing a secret that's both thrilling and a little bit embarrassing.

"Did you buy diapers then use them so that I could have whats inside when I got home?"  Becks eyebrow raised.

"Yeah, I... I got them for you," Phin mumbled, his voice barely above a whisper. "I know how much you like... you know, my 'stuff'."  It was still a little hard for Phin to say poop or shit out loud.

Beck raised his arms wide.  "Well I guess we are boyfriends now."  Beck said not as a question, but as a statement of fact.

Phin felt a lump form in his throat, his heart racing. It was true, he had been doing all this for Beck. The diaper was a symbol of his submission, his willingness to indulge in Beck's fetish. And yet, there was something about it that turned him on too. The way Beck looked at him, the way his friend's eyes lit up when he saw the mess he had made.

Beck's tail twitched as he took a step closer to Phin. He was smaller, but in that moment, he was the dominant one. His paws reached up, gently cupping the back of Phin's diaper. He squeezed, the plastic crinkling under his grip. Phin felt the pressure on his ass, the warmth of his waste spreading slightly with the movement.

Without a word, Beck leaned upward and stole a kiss. It was soft and sweet, a stark contrast to the dirty reality of the situation. Phin's eyes widened in shock, his heart racing. It was his first kiss, and it was with a mouth that had tasted his shit before. The thought was so wrong, but it only made him want more. He leaned into it, his lips parting slightly.

Beck's tongue slipped into his mouth, and for a moment, all thoughts of diapers and waste disappeared. It was just Beck and him. But as Beck's paws roamed over his diapered ass, the reality crashed back into him, the squelching sound bringing him back to the present.

Breaking the kiss, Beck's eyes were gleaming with excitement. "I think it's time," he said, his voice low and hungry. "Let's see what you've got for me."

Phin took Beck's paw, the fur soft under his hand, and led him to the bedroom. The bulge in Beck's pants grew with each step, his arousal palpable in the air. The room was dimly lit, the curtains drawn to keep the harsh lights of the city at bay. The bed was still unmade, the lavender-scented blankets Beck had brought him weeks ago thrown haphazardly across the mattress.

With trembling legs, Phin turned and laid down on his back, the diaper's bulkiness pressing into the bed. He spread his legs slightly, the plastic crackling with the movement. It was an open invitation, a silent offer that Beck eagerly accepted. The goat's heart raced as Beck approached, his eyes never leaving the distended bulge of the diaper.

Beck's paws began to tug at the plastic tabs, his movements gentle but firm. The diaper loosened, the smell of Phin's waste growing stronger with each inch of revealed fabric. Phin's cock was fully erect now, straining against the plastic. Beck's eyes took in the sight, seeing a distinct bulge in the front of the goat's diaper.

"Ready?" Beck whispered, his breath husky and low.

Phin nodded, his chest heaving with anticipation. "Do it," he managed to say, his voice barely audible.

With a deft flick, Beck opened the diaper. The room filled with the pungent odor of Phin's waste. It was a smell that would have repulsed anyone else, but for Beck, it was orgasmic. His mousey nose twitched as he took a deep breath, letting the aroma coat his senses. His cock throbbed with excitement, the fur around the base.

Phin watched as Beck's eyes lit up like Christmas lights, a strange mix of hunger and love in his gaze. He felt vulnerable, laid bare in this position before his friend, but also incredibly turned on. The diaper was a mess.  His scat was caked on his fur having dried slightly.  A copious amount of his feces lay wedged on the bottom of his now brown diaper. And as Beck's paws touched the plastic, he knew that his friend was going to indulge in it.

Beck didn't just dive in, though. He took his time, his nose twitching as he took in the smorgasbord before him. Phin felt his insides quiver as Beck's tongue darted out, tasting the air. Then, without warning, Beck lowered his head, his snout pushing into the mess. Phin's heart skipped a beat as Beck's tongue slithered through the mush, searching for the perfect mouthful.

As Beck ate, Phin's body responded with  arousal. He heard his friend's mouth move with the sounds of his chewing and swallowing echoing in his ears. He found himself pushing his hips up, offering Beck better access to his diaper's treasure trove.

The scat was not as hot as it was when it had just exited Phin's body, but it was still a delightful treat for Beck. It had cooled and hardened slightly, but the taste and smell remained potent and intoxicating. Each bite was rife with flavors and textures, a culinary masterpiece crafted by Phin's body especially for Beck's enjoyment.

Beck's eyes widened with glee as he encountered the unmistakable crunch of undigested food particles within the goat's waste. He savored each bite, his cheeks bulging like a squirrel with a mouthful of nuts. These little surprises were like finding gold in a treasure hunt, a game that only added to the thrill of the act. The sound of Beck's chewing filled the room, punctuated by the occasional moan of pleasure from Phin.

As Beck took another large mouthful in, he did something he had never done before. He reached out with his small, nimble paw and wrapped it around Phin's hard, throbbing cock. Phin's eyes widened in shock, but Beck's gaze remained focused on the task at hand, his tongue swirling around his mouthful of feces.

The sensation of Beck's warm, wet mouth when he would go in and his ass with the feel of Beck's paw working his cock was overstimulating. Phin's hips bucked upwards, pushing his erection into Beck's paw. The mouse's paw was slick with his precum, and some of Phin's foul mess that stuck to his cock, making each stroke smooth, effortless, and degenerate. His soft scat was the lubrication that allowed Beck to move his paw up and down with speed.  The room was filled with the music of Beck's enthusiastic chewing and the wet slap of Phin's cock being jacked off.

Beck took his other paw and reached under the goat, grabbing a large handful of cooled, hardened shit. Beck's paw was warm, almost hot, compared to the diaper's contents. He could feel Beck's furry knuckles against his skin, the pads of his hand pressing into the mess. The pressure was gentle, but firm, as Beck pulled a large amount free from deep in the diaper.

Phin watched with wide eyes as Beck held the foul handful before him. It was a strange sight, his friend's paw filled with his own waste as Beck usually ate directly from the tap. With a grin that was part mischief and part love, Beck brought the handful closer to Phin's erect member.

Beck's eyes never left Phin's as he brought the soiled paw to the goat's erection. He smeared the shit over the head, watching as Phin's eyes rolled back in his head. The sensation was like nothing he had ever felt before, the roughness of the digested food on his cock. It was a dance of disgust and pleasure that Phin's body was all too eager to perform.

With a twisted smile, Beck leaned down and took Phin's cock into his mouth. The taste was unexpectedly bitter, the scent overwhelming. But Beck didn't falter. He had never dreamed of this, but when he came home today and saw Phin's dirty diaper and how that act in itself was one of love, he was more than happy to take the next step.  And now, it was a reality washed over Beck like warm sunlight on a winter's day.

Phin's eyes rolled back into his head as Beck's mouth engulfed him, the sensation of Beck's tongue swirling around his shit-smeared cock was indescribable.  Each bob of Beck's head brought a fresh wave of pleasure, mixing the sweet taste of precum with the rich flavor of his feces. It was like nothing he had ever experienced before.

Beck hunted for more of the sweet, disgusting scat. His free paw roamed the landscape of Phin's diapered mound, searching for treasure. As he found what was possible the last mound, one that was colder than the rest, he squished it in his paws causing the foul matter to move around his fingers.  Then, he brought that scat covered paw down to his own throbbing pink tapered cock and started to jack off.

Phin watched Beck with a mix of shock and arousal. It was a scene he never thought he'd see, yet here it was. His friend, his crush, was masturbating with his shit-covered paw, while sucking his own scat covered cock. It was like watching someone perform a sacred ritual, the most taboo act. The room was thick with the scent of their shared perversion, the air heavy with the promise of something more.

As Beck's paw worked faster, Phin felt his climax approaching. His eyes rolled back into his head, his breath coming in quick, shallow gasps. He could feel his balls tightening, the pressure building until it was too much to bear. With a loud groan, he erupted into Beck's mouth, his cum mixing with the mess on his cock and the feces Beck was eagerly licking off.

Beck didn't stop sucking, almost as if trying to coax more goat cum out of his friend. His paws were a blur of movement, one squeezing out more of Phin's waste while the other stroked his own cock in time with his mouth's movements. The taste of Phin's cum was like a sweet dessert after a rich meal, a perfect complement to the earthy flavor of his shit.

As Phin's orgasm subsided, Beck pulled back, his muzzle glistening with a mix of semen and feces. He looked up at the goat, his eyes glazed over with pleasure. He took a deep breath, savoring the scent that surrounded them, and then with a final, decisive movement, he swallowed.

The warm, thick liquid slid down Beck's throat, a forbidden mixture of flavors that were both familiar and new. The taste of Phin's cum was sweet, but it was the scent of his friend's waste that truly sent him over the edge. He felt his own orgasm building, a pressure in his loins that demanded release.

With a guttural growl, Beck's own hips began to buck, his cock spurting ropes of cum that arced through the air and landed on the bed, the used diaper, and even a few drops splattered on Phin's belly. Beck shot farther than he ever did.  Each rope of mouse cum was as thick as the last.  Truly, he coated everything as if to claim it all as his own. It was a mess, a beautiful mess that encapsulated their twisted love.

They both lay there for a moment, panting heavily, the room filled with the scent of sex and shit. The tension of the moment had broken, replaced by a strange kind of giddiness. They looked at each other, the absurdity of what they had just done finally sinking in. And then, as if on cue, they burst into laughter.

It was a laugh that was part relief, part disbelief, and part pure, unbridled joy. The kind of laugh that bubbles up from the depths of your soul and takes over your body, making you shake and snort and gasp for air. Phin felt his stomach clench with each giggle, his diaper squelching with the movement. Beck's eyes sparkled with delight as he watched Phin's reaction, his own tail wagging with delight.

"That was amazing, Phin," Beck finally managed to say, his voice still thick with amusement.

Phin lay there, his diaper a mess of brown and white, his cock still semi-hard. "I can't believe we just did that," he whispered, his voice filled with awe and a hint of disbelief.

Beck chuckled, licking the last traces of cum and shit from his muzzle. "Do you regret it?" he asked, his eyes gleaming with hope.

Phin's cheeks flushed a brighter shade of red as he met Beck's gaze. Without a moment's hesitation, he leaned in and gave Beck a quick kiss on the lips. "Not one bit, boyfriend," he murmured against Beck's mouth. The taste of his own seed mixed with Beck's saliva was still there, but it was overpowered by the minty freshness Beck had left behind. The word 'boyfriend' felt strange, yet somehow fitting. It was a declaration of their shared love and acceptance of each other's darkest desires.

They both stood up, their legs wobbly from the intense experience. Beck took Phin's hand and led him to the bathroom. The walk was a strange mix of awkwardness and intimacy, with the diaper still clinging to Phin's body. Beck's paw was sticky with Phin's cum and shit, and he couldn't help but bring it to his nose to take in the scent again.

In the bathroom, Beck turned on the shower, the water steaming the mirrors and filling the room with the sound of falling rain. He helped Phin step out of the diaper, the mess falling to the floor with a wet plop. They stepped into the shower together, the hot water cascading down on them, washing away the evidence of their love.

Their kisses grew more passionate, their tongues dancing together as the water streamed over their bodies. Phin's cock, still half-erect, brushed against Beck's, sending sparks of pleasure through them both. The feeling was electric, a stark contrast to the cold, hard floor that had been their playground just moments ago.

As the two professed their love through their kisses, the world started to fade away, leaving only their two beautiful, but filthy, souls intertwined and glowing in the night.