'Oh, oh, Dean! Uh, uhhh…' Cas gasped as Dean teased the head of his cock with the tip of his tongue before swallowing him back down, as much as he could anyway. He was getting much better at not gagging and there was minimal drool as Cas grabbed Dean's hair with both his hands and cried out wordlessly as he came in Dean's mouth. Dean swallowed dutifully, still a little unsure about the whole cum thing but not enough to stop swallowing it, and licked his swollen lips, making sure they were all clean as Cas pulled him up, one hand still in his hair, the other wrapped around the back of his neck, and kissed him slowly and deeply, enjoying the taste of himself inside Dean's mouth.

'My turn,' Cas whispered into Dean's ear as he pushed him back onto the bed and started to unzip his jeans. Dean was achingly hard, had been for a while, so when Cas released him from his boxer shorts, the cool air was a welcome relief. Dean propped himself up on his elbows so he could watch as Cas wrapped his beautiful pillowy lips around his cock and started to suck and lick. Dean figured Cas had been watching porn and looking on the net to get tips because every time he gave Dean head was even better than the last.

Dean gasped and bucked his hips on instinct as Cas flapped his tongue against the sensitive underside of his cock before sucking hard, hollowing his cheeks as he took Dean deep into his throat; the hot convulsing heat of it making Dean cry out and grab at the sheets. Cas hummed and reached behind his balls to gently stroke his perineum before pressing two fingertips against it, sending off just-this-side-of-painful sparks that had Dean moaning and throwing his head back, his orgasm already so close. Despite the shock at the feeling when Cas stroked his hole with a lubed finger, Dean couldn't help but make a desperate keening noise when the finger breached him and slid inside.

'Oh, fuck me! Cas!' Dean arched his back and came so hard that his vision clouded over and he couldn't move his limbs, sinking into the bed as Cas climbed up and lay down beside him. Still panting a little, Dean turned his head to face Cas. 'Dude! What the fuck was that?'

Cas raised his eyebrows and tilted his head a little, making his confused kitten face. 'I was trying to manually stimulate your prostate, Dean. It is located in the-'

'I know where it's located, Cas, Jesus. I mean, you know…' Dean made a vague whirling motion with his hand that even he wasn't sure what it meant. Cas frowned.

'I do not know, Dean. Did you not enjoy it? You seemed to enjoy it.' One side of Cas's mouth quirked up even as a faint pink blush spread across his cheeks. Dean loved it when Cas blushed; it was so human. He reached out and cupped a hand around Cas's stubbly cheek, feeling the warmth blooming under the skin.

'Yeah, Cas, I did but… The, ah, brown eye is a sensitive dude, you know? You can't just explore… unexplored territory without a little warning… and lots of cleaning.'

The smile dropped from Cas's face and he propped himself up on his elbows, concern in his eyes. 'Did I hurt you, Dean? I'm sorry, I know it can be p-'

'No, no, hey, Cas,' Dean pulled his angel in closer, tucking his head under his chin, 'No you didn't hurt me, it's just, maybe we should talk about… doing all that before we actually do it.' He felt Cas's head bob in agreement under his chin.

'Yes, Dean, we shall do that… tomorrow.'

Dean chuckled and pressed a kiss to Cas's forehead. He heard the contented little sound Cas made and smiled, silently pulling him in even closer to Dean's left side. Cas made another happy sound, almost like a chirp and Dean couldn't help but laugh.

'I wouldn't be surprised if you started purring one day.'

Cas huffed a little then curled around Dean, throwing his left leg over then between Dean's legs as he snuggled, and there was no other word for it, closer. At first Dean had felt weird about the snuggling; he'd never really done it before, not even with Lisa, not in this way. Nothing before had ever been like… this. Maybe it was because they had seen each other at their worst, maybe it was because they'd fought together, had a bond forged in war, but Dean felt oddly safe with Cas, like he could relax and just be without all the constant noise and fear. He'd never felt anything like it before and it made him happier than he'd ever been.

'I love you, Dean,' Cas whispered into his ear and Dean smiled again, eyelids fluttering open, his view filled with beautiful blue. Cas gently kissed him on the lips then settled down to sleep, the corner of his mouth quirking up as he drifted off.

'I love you, Cas,' Dean whispered just as Cas began to snore.

~#~

As happy as Sam was for his brother and his friend, and he really is happy for them, he can't help but be slightly icked by the constant PDA's and all the snuggly cooking. Now that Cas was happy, he had started eating properly, much to the brother's relief, and had actually started to enjoy cooking, trying out all different types of recipes that he found on the internet and using Dean as his guinea pig. Unfortunately for Dean (and fucking hilariously for Sam), Cas's cooking wasn't… great (Sam tried Cas's chicken Alfredo once; never again). The first time he walked in on Cas feeding Dean bits of the pie he'd made for Dean (which seemed to be burnt on one side and smelled funny), Sam had to leave the room so he wouldn't burst out laughing at the sight of his brother, pie aficionado, feigning enthusiasm and trying not grimace as Cas fed him his terrible, half-burnt-half-raw apple pie ('I don't know how he does it, man, but even his pie tastes like ass,' Dean whispered as Sam cried with laughter into his shirt sleeve so that Cas wouldn't hear).

Wandering into the gun range and finding them making out like desperate teenagers against the wall had added to the unnecessary things Sam had lodged in his head. But, the absolute worst, the thing that made Sam wish he was deaf, was the sound of them having sex. They were not quiet.

Sam had taken to wrapping a pillow around his head as he heard, for what seemed like the millionth time, Cas moaning his brother's name and the bed squeaking as they did… whatever it was they did. Sam didn't want to know.

In view of all this, he really should've seen it coming. He knew Cas fairly well and knew his dumbass brother better than he needed to so he should have realised that one of them was going to be annoying enough to come to him with their awkward questions. Part of him was relieved that it was Cas; at least he was understandably innocent when he asked questions.

Sam's sitting in the library, idly surfing the internet under the guise of research for what sounded like a simple salt 'n' burn job Sam intended to take care of alone so as to get some time away from the other men, when Cas wanders in, holding two cups of coffee and that look he gets on his face when he wants to talk about something. Sam's happy to note that his friend appears to have gained weight and all the cuts on his arms have faded, not to be replaced with more. The life is back in his kind blue eyes and he's walking with a little more confidence, not so much looking like he was being crushed under the weight of all his losses.

'Hello, Sam. I made you a coffee,' Cas said calmly as he placed the steaming mug next to Sam's right hand then sat down at the table opposite him.

'Thanks, Cas.' Sam smiles and takes a sip, pleased to note that Cas had remembered the hazelnut syrup.

'Sam, I was wondering if you could perhaps help me with something. I'd like to surprise Dean and I would go alone except I think I may require assistance once I arrive.'

'Ok, Cas, what did you have in mind?' Sam asked as he took another sip of his coffee.

'Well, as you know, Dean and I are in a romantic relationship.' Sam felt his stomach drop as he immediately guessed where this might be going. 'We have not had penetrative anal sex yet-'

'Jesus, Cas!' Sam yelped, his eyebrows shooting up into his hairline, his hands coming up to cover his face as if that could kill off the image of…them… doing that… 'Christ, brain bleach needs to be a real thing.' Sam peeked between his fingers to see an annoyed-looking Cas staring at him, his brow furrowed, mouth pouted.

'Sam, please be sensible. You are, I am sure, aware that Dean and I have engaged in several types of non-penetrative sex because we are in love,' Cas huffed, looking and sounding offended at Sam's reaction to his words. Sam sighed and dropped his hands from his face and tried to force his brain into neutral territory; Cas and Dean are in love, Sam knows they do…stuff and is adult enough to handle it and help his friend. Really. He is.

'Yes, Cas, I am aware, it's just hard… difficult to hear about your brother's sex life, you know?' Cas tilted his head to the side and stared. Sam sighed. 'Just tell me what you need. Use as little detail as possible.'

Cas squinted at him for a moment and Sam felt a slight tug of sadness, remembering how he'd thought it so funny that a being as powerful as Castiel could be so baffled by things and how Dean always referenced movies and books more when Cas was around, just to see that head-tilt and those squinty eyes. He never told Sam that of course but Sam already knew that's why he did it. His brother had loved the angel even then. Sam sighed again and mentally girded his loins.

'How can I help?'

~#~

Sam had seriously underestimated just how mortifying this trip to the pharmacy would be. He would have thought that Cas would've learnt a little modesty by now, a little something about privacy; nice human shame. But no. Cas did not give one solitary fuck. Sam became immediately aware of this as soon as Cas unfolded his little list and said, far louder than necessary, 'I wonder where they keep the anal lubricant,' before marching off down one of the aisles, a shame-faced and furiously blushing Sam slumping down and cursing his height as the many other customers turned to stare.

Cas was already holding two separate containers of lube when Sam hunched down next to him and was reading the information on them.

'Sam, what do you think? This one is thicker which is better for anal sex, lasts longer so there won't be any rectal tearing…' This is proof that I never escaped from Hell, Sam thought as Cas wiffled on about water-based versus silicone-based and other things Sam never wanted to hear about. Lucifer will pop up any minute now, holding a megaphone and pictures of Dean and Cas doing it on the kitchen table.

'Sam? Sam!' Cas was right up in his face, noses almost touching, filling his vision with bright blue as Sam blinked and came back to the present. 'Sam, are you unwell? You look very pale.'

'I'm fine, Cas. Look, why not get both then you're, erm, covered either way.'

Cas looked from him to the bottles and then smiled, the big one that showed off his gums and made Dean make that goofy smooshy face with the heart eyes, then placed both containers into a shopping basket that seemed to appear from nowhere.

'Good idea. Thank you, Sam,' Cas said, turning the smile on him before looking down at his list and wandering off, humming to himself under his breath. 'Hmmm, now where are the anal douche kits?'

Sam blushed even harder and prayed to no one that this little excursion would be over soon.