The large bathroom of the bunker was filled with hot steam to keep Dean warm, as Cas was resistant to both cold and hot, the fog pooling and swirling around their legs, up to their thighs.
The way Castiel was interested in the human body and its functions so thoroughly and shamelessly, physiologically and psychologically, was sometimes downright disturbing, but when Cas'd learned about watersports and delved into learning more, he'd gotten Dean caught up in the interest, enough so that they'd been watching videos with growing curiosity.
Research. Research for what they might want to try themselves, and what was a hard no.
When they'd watched a man piss on another man's erect cock, and the man coming in seconds after the flow ended and he got his hand on himself, Cas had made up his mind, very determinately, and Dean agreed.
They hadn't had to argue about roles in this particular scenario, as it was instantly evident who wanted to be on the receiving end. Cas's eyes had been wide and black with lust, and he hadn't seemed to get fondly laughing Dean out of his clothes and prepped quickly enough, since Dean had insisted on how gorgeously adorable Cas was when he discovered a new kink in himself.
Cas had buried himself to the hilt in Dean's ass a mere moment after that, and Dean's amusement had turned to full-on appreciation of that fat, long cock pounding into him brutally. That had been a proper and thorough fuck that Dean reminisced with happiness and often.
Dean shifted on his feet, naked, looking a bit sheepish, when Cas took his hand and kissed his knuckles.
"What's wrong, Dean. You have to tell me. Please, words."
"I'm just, maybe, kinda, still not sure, it's… It's just that it's–"
"Urine, Dean. Piss, as you put it. It's a bodily fluid, it's coming from inside your body, and I want to do this," Cas explained softly and stepped closer as Dean shifted his weight, standing under the shower. The shower was off after they'd run it hot to create the steam, and it was the obvious spot for this.
Dean was forced to look Cas in his aquamarine eyes blown wide with lust, when Cas raised his head by putting two fingers under his chin and lifting.
"I want us to do this. Let me worship at the altar of you, Dean Winchester. Let me experience this. Let us experience this, before we decide if we want to do it again. You know I'll never force you against your will, but this is what I want. I want you piss on my straining cock."
Cas stared Dean straight in the eyes, steadily, searching, and when he found his answer, he captured Dean's lips in a sweet kiss that had Dean feel like he was floating off the ground a bit.
The pure desire on Cas's earnest face was enough to brush away the rest of Dean's apprehensiveness, and sure enough, Cas's cock was rock hard and indeed straining, red and leaking.
Dean's mouth watered in a Pavlovian response at the sight, and all his worldly worries melted away. His angel wanted this experience, then Dean would happily give it to him, his craving to please his angel in any way he could, taking over forcefully.
Dean had been drinking lots of water all day, soda, even tea in coffee's stead so that he didn't have to relieve his bladder too much before they got their time together.
Now his bladder was full, just as planned, just waiting for the right moment.
"You need to come closer, Dean. Please come to me." Cas wrapped his hand around the base of his own cock, squeezing hard to abate his need, and Dean moved, so ready for this. Oh, so very ready for this. If for nothing else, the loving look on Cas's face would've convinced him to do anything for him.
With the shower room warm and foggy, and the faucet off, the noises they made echoed, making it all seem so loud. Almost too loud. But then Dean realized that even if this was a secret to anyone else, it wasn't for him and his husband, and at that moment he didn't really care about loud . The bunker was empty aside from them anyway, and would be for hours.
They could make all the noise they wanted.
Dean took the steps to get to the right distance from Cas for this, and Cas immediately put his hand on Dean's arm, gripping him lightly, pulling him just a little closer, situating him, grounding him, and looked down between them.
"Please, Dean," Cas nearly whispered, voice deep, hoarse and almost gone.
Dean aimed his cock as Cas took his hand away from his own, and Dean could feel it starting, the light pinch on his prostate just before the flow started, his cock
twitching once with the force of the stream.
His piss was clear and watery, and it landed right on the exquisitely responsive skin of the underside of Cas's cock, and Cas trembled, shivered, and moaned a long deep cry.
Cas's hand was gripping Dean's arm like a vice while his other hand sought to Dean's hip, fingers leaving bruises there that Dean would wear very proudly.
"It's like– It's like you keep coming on me and it never stops, it never stops, don't let it stop, ooh, Dean!" Cas sobbed, his head down, staring at the stream of piss hitting his cock.
The angel was ecstatic, euphoric, cock bouncing so hard it was difficult for Dean to keep the stream of piss directed to it.
Sadly, Dean's steady stream had to stop, in only seconds and much too soon. The moment he felt his bladder going empty, he took the last step separating him from Cas and flung his arms around him, pressing the two of them together, groin to chest, seeking closeness and friction, in complete awe of Cas's reaction. Dean's cock was pulsing and pulsing, getting hard in record time.
Dean held Cas as he wrapped his arms around Dean in turn, his hips working, his cock rubbing against Dean's hip and his cock, a teasing touch for Dean, but so much for Cas, who was lost in his own realm and let out groans that made Dean's cock leak profusely.
Dean knew that euphoria full well, and Dean wouldn't dare disturb Cas, not now, as it would destroy this beautiful moment for Cas.
Cas bucked his hips and came almost lazily onto Dean's abdomen with a long wail, throwing his head back, exposing his ling sinewy throat and that Adam's apple Dean had the strongest urge to bite around.
Cas's moans were not getting any more silent in long moments, when Cas still kept grinding against Dean while Dean kept him up in his arms. Dean had all the time in the world to notice the near painful expression on Cas's face as he let his head loll back, his eyes scrunched shut, his brow furrowed in deep concentration and, frankly, the mesmerizing trance written all over those divine features.
Soothing Cas's back in circles with a steam-slicked hand, Dean brought Cas back to him softly, and after a while Cas emerged.
"You back?" Dean asked gently, carding his fingers through Cas's tufty hair.
Eyes bright and gleaming with joy, Cas kissed Dean quickly, and tried hard to explain what had happened to him. "Dean, Dean , it was," he gestured in a way that encompassed everything possible, and made absolutely no sense to Dean.
"It was," Cas let out a small incredulous laugh, giddy, "It felt like a long, continuous ejaculate, hot on my cock, and there was so much you, it didn't end." Cas's eyes were enormous as he tried to put his experience into words.
Deciding to go with a more tangible example, Cas caught Dean's mouth in a passionate kiss into which they both moaned, Dean's cock standing proudly at the pure excitement of his angel, somehow sharing the adrenaline. Cas sucked at Dean's bottom lip, moaning quietly and sighing, before thrusting his tongue into Dean's mouth.
Dean made this happen. Dean gave this to him. The understanding fully hitting home almost knocked Dean on his ass. He'd never seen Cas quite like this. This fulfilled and joyous about it. It made Dean want to be able to come buckets so Cas wouldn't have to settle for the second price. But if pissing on Cas was making him lose his mind Dean was pretty sure he could schedule more of that into his calendar.
Pulling back, Cas laughed again and shook his head slightly as if in disbelief of it all being real life. "I want you to fuck me, beloved, I want all that I can get, everything you. I love you, Dean."
Instantly in motion, his cock more than his brain leading him, Dean grabbed the lube they kept in the shampoo basket, and Dean took Cas's hand and tugged him him to the wooden bench beside the door.
Cas was right on board and was bending at the waist to lean his hands on the wood, his ass in the air. Dean couldn't resist. He had to kiss the puckered pink hole that was on display so beautifully.
"I want you to ride me Cas. Put some of that pep into good use," Dean slapped Cas's ass lightly making him jump and gasp.
Cas sighed long and dreamy, deep from within his chest, both at the words, and the slide of two lubed fingers slowly entering his channel, Dean pushing in steadily, and beginning to scissor and pump his fingers in and out. "You feel so loose, baby, just right, so ready to take my cock."
"Hmmm" Cas hummed happily, impaling himself on the fingers just because it felt so good. He'd told Dean that several times. Because the angel actually needed the prep, there was no other reason for it, but Cas's inherent need to have any part of Dean inside him right where he belonged. Cas wanted it.
"It was such an exceptional, earth shattering experience. Nothing quite like it...Ah, I'm so relaxed, beloved, I'm amazed I can hold myself up."
Dean could hear the tranquil smile in Cas's voice while he removed his fingers and grabbed Cas by the waist. And Cas's arms were trembling now that Dean paid attention to it. What it had to take to reduce an angel into such a gorgeous mess… It really got Dean thinking.
Dean pulled Cas back by his hips, supporting as well as rushing him since his own cock was desperate to be engulfed by Cas's asshole, to be buried to the hilt and be one for as long as they could make it last.
Sitting down on the bench, Dean took Cas with him spreading his legs wide. Angling his cock and guiding Cas down, the head of Dean's cock slid in past the first ring of muscle gripping tight at the intrusion, drawing a low moan from Dean's throat, the sound unbidden when Cas sat down.
Taking all of Dean in one long slide Cas's head was thrown back, soundless with his pleasure, breathless, and his finger's kneading Dean's thighs while Dean held Cas by his waist just below his rib cage, offering the support Cas needed.
Cas's back was arched when he gyrated his hips, grinding down into Dean's groin, making it so good for both of them. Dean's cock teased Cas's prostate, and the circling motion drove Dean slowly insane.
Sitting back for a moment, slinging his legs over Dean's for better purchase, Cas was leaning forward in the next blink and trusting Dean to hold him. He began a relentless pace, fucking down onto Dean's length, his hands grappling to squeeze Dean's thighs rhythmically, his fingers digging in as the pleasure built and Cas got more frantic by the second.
The beautiful, so arousing sounds each slap of their skin tore out of Cas and bouncing back from the walls went straight to Dean's cock like an electric dart, already tightening his balls and ready to come.
"Cas sweetheart, you're so good, so good to me," Dean chanted, hand stroking Cas's side tenderly in sharp contrast to the wild coupling.
The words and the wrecked sound of Dean's voice seemed to drive Cas even further into his piss-induced frenzy, the angel picking up pace and punching out delectable, long groans out of himself, "Aah, aah, aah, Dean, Dean , I love you filling me so well, so full! More, more, more, please!"
The echo of the bathroom somehow made the sounds last longer, the noises of their copulation all around them in a way they never had been before, since the sound of a running shower wasn't there to drown them out like usual. Dean swam in it, Cas's whines and groans enveloping and lifting him sweetly.
Dean wrapped his arms around Cas's torso and pulled him against his chest while Cas shifted his hands to Dean's knees so that he could lift off Dean's lap that small, but important distance.
Hips twitching up into Cas's ass every time Cas landed heavily down into his lap, Dean's eyes scrunched shut against the burgeoning pleasure, the warmth in his chest, and the stimulating tingle all over his limbs and groin that threatened to escape through his cock too soon.
Dean started fucking up into Cas like a madman, all thought leaving his brain, except for the almost excruciating pleasure he was taking from Cas's body, and having the presence of mind to wrap his hand around Cas's cock tight, getting off on the dirtiness of it, pumping in time with his thrusts while Cas lolled in his back like a ragdoll, the little whines and gasps an indication that this was utter perfection for Cas.
Sitting up straight as if being electrocuted, Cas's back curved, and Dean felt the pulse-throb-swell of Cas's cock and the tight squeeze of his ass when Cas orgasmed hard, and came all over the bathroom floor in sharp, short, rapid bursts, pulse of it in sync of his racing heartbeat.
A blink later Dean thrust up with everything he got and came deep inside Cas with a low possessive growl, pushing in deeper, marking Cas as his own.
They panted and breathed, coming down slowly from the height they'd just conquered together.
Cas was slumped against Dean with Dean's arms tight around him, Dean resting his chin on Cas's shoulder, pressing kisses everywhere he could reach.
"We need to start showering more," Cas turned in Dean's hold enough to wink at him, kissing Dean's jaw and earning an approving chuckle.
"Next time it's definitely my turn–" Dean was suddenly hit with a crushing thought, his heart sinking. "But you don't… I mean, can you…"
"I can produce urine if I want to, Dean. Just that I don't need to expel doesn't mean I can't," Cas grinned, curling his fingers between Dean's and pressing their joined hands to his chest.
Dean let out a relieved sigh, once again putting his chin on Cas's shoulder, murmuring into his ear. "That's a relief. That's… Good." Dean planted a soft kiss on Cas's shoulder, and Cas kissed Dean's knuckles in return. "I just need to figure out a way to express the need to piss like a racehorse if Sammy's there. Or I do actually know how to do that, but what excuse do I make up to have to absolutely have you with me?"
"I'll teach you some more Enochian. Sam doesn't need to be none the wiser. I don't expect him to know the vocabulary of bodily fluids and functions very well."
"Good plan," Dean said excitedly, a plan in motion. "Seriously, Cas. My turn next. I'll let you know after you teach me," Dean smiled lasciviously.
"I think it might still be my turn," Cas said with laughter in his voice. "I'm addicted already. Just the thought of it… Oh …"
Cas slumped further against Dean and Dean was sure the angel did it on purpose, almost falling off making Dean catch him and haul him back with an amused chuckle. God how much he loved Cas.
"I think we need a shower" Cas intoned but not sounding very enthusiastic about getting up just yet, but the steam that had kept Dean warm until now had dissipated. Dean had started to shiver slightly, his sweat cooling on his skin. And of course Cas had noticed that.
So Cas stood up and held a hand for Dean, hauling him up, and taking Dean's face between his hands, bringing him into a slow kiss that warmed Dean to the core, though the goosebumps erupting on his skin might've indicated otherwise.
"Let's shower and I'll get you some of that cherry pie in the fridge. With whipped cream and extra cherries" Cas grinned lovingly, knowing full well which buttons to push to get Dean moving.
Dean turned Cas around and slung his hands on his hips, guiding him towards the shower. "I'll wash your back if you wash mine," Dean said, determinate, marching them forwards.
Turning the shower on Cas gave a mirthful laugh. "If you let me wash your hair."
"Only if you let me wash yours. I can't wait to get my fingers into that lovely mess again. Though first I really need to clean out that gorgeous hole of yours. With my tongue. I left a mess. "
The banter went on until every body part was squeaky clean, their showering peppered with kisses everywhere, long languid moments under the spray when they were lost in each other's mouths, satiated and happy.
And there was pie waiting for dessert.