A/N: It's just "post all your old fanfictions" night. Hope you enjoy.
They fit together, Sam concluded as his brother showered in the other room. Dean and he were like two halves to a perfect whole. And in a way, they were. Dean was the brawn to Sammy's brain, and while Sammy was more resigned, Dean took charge, putting everyone back in their place with the barest brush of his hand or a careful selection of words.
Perhaps, Sammy concluded, this was why Dean topped.
The last time they'd lain together was reminiscent of all their past times together. Dean initiated, almost attacking Sammy as he woke. Sam remembered the flash of Dean's lips on his before the realization that Dean sleeps naked hit him. Sam was being stripped by anxious hands, and before he knew it, he lay deliciously naked on top of the sheets being assaulted by his brother's teeth. The wet feeling of Dean's tongue seemed both smooth and rough as it was pulled over Sam's chest and rubbed on the underside of Sam's neck. Dean cleared his throat and Sammy looked at him just in time to see Dean engulf Sam's length in his mouth and swallow around it.
Sam gasped and hissed, the feeling new and unusual, but nonetheless sending pinpricks of pleasure up his spine. Dean continued going down on Sam – perhaps a bit too rough, but it wasn't like Sammy was complaining – until the taller man gripped Dean's sleep-tousled hair and pushed him down harder onto his length with a wordless shout as he came. Dean swallowed, satisfied. Sammy fell back onto the pillows, already worn out, but when Dean picked himself up and started to crawl closer to his brother, Sam's libido woke him back up, begging for Sammy to be taken by Dean.
Much to his surprise, Dean flipped the two of them over so he was on the bottom. The elder brother tossed Sam a bottle of lube, and Sammy caught it without thinking, applying it to Dean first in rough strokes, then to himself. Despite Dean's protests, Sam pushed in slowly, savoring all the sounds that Dean made as he was stretched by Sammy. The taller boy's fast and merciless thrusts followed, leaving Dean to curse a blue streak and scratch at the sheets with his nails in an attempt to not come too quickly.
Sammy snapped his teeth at Dean's neck and nipples, rolling the taught skin between his teeth and sucking at it, leaving marks and love bites to decorate his brother. Dean struggled to keep his face impassive as Sam growled over him. But when he nipped at one of Dean's more sensitive spots, Dean knew he was closed. His eyes closed and he arched his back into his brother as he came with a low moan that had Sammy scrabbling for his release.
They both lay together, sweating, moments later. Dean's nails, though short, had ripped long gashes in the sheets which were already guaranteed ruined beyond repair with both boys' come dried into it.
Dean was the first to move, claiming the shower before Sammy could, leaving Sam to think about his brother and what the two are capable of doing together.