"Dean, are you sure about this? You don't have to…"
The angel's words died in his throat as Dean's lips enveloped his cock.
There was no comparing the sensation to anything else he could have imagined: Dean's lips on his own had given him a weightlessness he had never known- even when he was in flight. Dean's hands on his body or both their bodies rubbing against one another stirred a hunger in him that dwarfed the effects of Famine. Dean's hand wrapped tightly around his cock, could bring him to a place of desire he lost himself in. But the newness of this next level of lust surpassed all others.
A warm wet tongue teased his head; lapping at the slit, made Cas arch his back and groan with satisfaction. He wanted this; he knew he would from the moment he had learned what it meant to feel, really feel. For thousands of years he had watched the human race- seen them pleasure each other in countless ways, and never take an interest. Until the moment Dean had touched him he didn't understand just why humans would do such things.
"Dean, I…"
"It's ok, Cas."
The hunter whispered into Cas's groin, placing a calming hand on his thigh before driving the angel's stiffness back into his mouth with a force that made the Cas's breath hitch and his body buck.
Castiel was enjoying himself, there was no question, but he couldn't help feel that Dean could not be getting any gratification of his own. In fact, he couldn't help but imagine taking things to the next level. He knew what was involved in intercourse, but never having participated himself it seemed the only thing he actually wanted was to be one with his hunter. They were going slow, working up to the act, for obvious reasons, but Cas was never fully satiated because there was always something new to discover in Dean's touch.
Dean liked being the one to show Cas everything there was to know about sex, even if he had to figure some of it out as he went. They were both new to so much of it that they were taking it slow, but a part of the hunter wanted nothing more than to turn that angel over and push himself inside. For now though, this would do; this would be enough to give him that perfect hard-on he had recently re-discovered but never before appreciated. He was like a teenager again, sexually frustrated and loving every moment of it.
Dean didn't know what he was doing, but he knew what he liked when he was the one receiving. He liked the smoothness of Cas's length between his lips, the hardness, and the warmth of his body. He liked the taste of the angel's skin and the smell of him. He mimicked moves he had experienced himself, but it was also an instinct. The way Cas responded made it erotic, made him want to tease, and suck, and bite, and lick, and kiss, until he felt the warmth of Cas coming in his mouth.
But the angel wasn't willing to let go yet, so the hunter cupped his balls with one hand, gently rubbing his thumb over them in circles as he pumped with his other hand and his mouth in sync. When Cas leaned back and reached out to grasp Dean's shoulder he knew his hard work was going to be rewarded.
With a buck and a shudder the angel moaned at the loss of himself and Dean swallowed him down, licking him clean.
Stroking his face from his nose to the point of his chin Dean took a deep breath and looked into his angel's eyes.
"I'm sorry that didn't bring you to fruition as well, but I can attest that I do enjoy fellatio."
Dean's eyes widened as the smile crept across his face, leading to a laugh that exploded out of him. Clapping the angel on the shoulder he pulled him into an embrace. Sighing into his ear he chuckled.
"Cas, that was more than pleasurable for me. Seeing you this way is all the fruition I need."