A/N: I'd love some constructive criticism on my "sexy" scenes. I've never EVER been able to write smut, so I'm not gonna try, but I'd love some feedback on whether or not I'm good at writing borderline smut. You guys are wonderful!

Sometimes a kiss is just a kiss. With most of the people Dean had been with, kisses had been nothing more than a prelude to sex or hooking up. He had kissed a lot of people during his 26 years. He no longer remembered every name and he had even kissed Jo on more than one occasion, typically when some kind of intoxicating substance was involved. To him, kissing meant nothing. Kisses were nice, like a breeze on a warm day, but ultimately Dean had always found them inconsequential.

Dean knew this wasn't the situation with Castiel and he was fretting over this. He wasn't sure what their first kiss had meant and he hated that he had to find some kind of purpose in it. Knowing Castiel, he knew he had to find it quickly. He knew there was potential for it to mean nothing. Cas had been there for him during a vulnerable moment and, despite what he had told himself in the beginning, he had always found the other man attractive, although he hadn't thought about it too much. On the other hand, Dean also knew there was potential for it to mean everything, because of the simple fact that he had been vulnerable with Castiel in the first place.

After the kiss, Castiel had clearly been stunned, but to Dean's surprise, he didn't say much about it. He had stuck around for another 15 minutes. Dean told him more about Sam and the other man eluded more to his own issues with mental illness. Then Jo called and said she was leaving work early. Castiel had left before she had arrived, citing a pile of papers to grade, and had left without a word.

Two days after their first kiss and his conversation with Sam, Castiel invited him over to study while he graded papers. It was the first time Castiel had ever invited him over directly. Castiel sounded totally normal over the phone and that made Dean feel better. Maybe it wouldn't be weird.

He arrived around 7:00, grateful that they were hanging out together without social theory, without Jo and Charlie. He knocked on the door and Castiel answered, wearing a pair of beige cords and a grey t-shirt. Dean realized he was seeing him with new eyes, because he hardly ever noticed what Castiel wore, and on this night, he couldn't help but notice how tight the pants were. Dean knew going to be difficult to study that night.

"Hello Dean." Castiel said, smiling at him.

"How's it going, Cas?" He asked, coming into the apartment.

"I am well. Unfortunately I have two dozen short answer tests to grade." He said, sighing. "Would you like something to drink or eat?"

Dean shook his head, remembering what happened the last time they drank. "I'm good."

Dean sat down on the couch and they spent the next half hour working without much distraction. He glanced at Castiel, who was hunched over papers, glasses falling down his nose. He watched as Castiel actually grimaced at an answer on the test, and scribbled something in red pen.

"You actually use red pen to grade your papers." Dean said. They hadn't said too much since he had arrived and it was making him uncomfortable.

"Yes. I feel like it gets the message that something is incorrect across more effectively than any other color." He said, as he crossed an answer out.

Castiel's glasses fell further down the bridge of his nose and he didn't move them back up. A piece of long brown hair fell in his eyes. Dean couldn't help but notice how unbelievably adorable he found Castiel right now. He was like the typical geek-hot librarian in every porno that Dean had ever watched. Compulsively he reached over and moved the glasses back up his. Castiel glanced at him, but didn't say anything, so Dean let his hand linger on his face. He moved his hand up to his forehead and brushed the hair out of his eyes. He slowly pulled his hand away.

"You need a haircut." He said affectionately.

"What are you doing?" Castiel asked.

"Nothing… I mean… I don't know." Dean said dumbly. He felt his cheeks heat up.

"I need to work, Dean." Castiel said roughly. "These need to be done in the next two days."

"Sorry." He muttered, and returned to his work.

They worked in uncomfortable silence for another 10 minutes, when Dean heard a laugh escape from Castiel's lips.

"Christ." Castiel muttered. "Failure. You are a failure."

"What?" Dean asked, feeling very small all of the sudden.

Castiel sighed. "This class is a collection of the dumbest human beings I have ever met. This particular test, well, it's almost painful how low the average grade is so far. This guy though… God, he's a moron. "

"Maybe he's like me." Dean said, smiling a little bit. "Bad at this stuff."

"No, this guy, I seriously cannot tell if he is being sarcastic, or if he's being serious and he's just that stupid. A little background, right? I'm teaching a section right now about the view of women in western culture throughout history. In this question I asked about the difference between the French and American views of femininity. Want to know what this guy said?"

"What?"

"This is verbatim. His answer to this question is 'Americans view women as being like Marilyn Monroe, while French men view women as being more masculine. This may be because American women shave their body hair, but French women do not. French women are more like men because they are hairy.' This guy fucking wrote that. Can you believe that?" Castiel said, looking appalled.

Dean couldn't help it. He burst out laughing. Hearing this, Castiel did too. They laughed uproariously for a few minutes, until they were both crying.

"He also… this leads me to believe he may be fucking with me… said that women got the right to vote in 1950. Like. Seriously. 19-fucking-50." Castiel choked, more giggles escaping his lips.

"Does this guy ever come to class? Like have you ever heard of him?" Dean gasped. He was laughing so hard he felt like his sides might split open.

"Of course not! It's a larger class, but I don't even recognize the name! I checked that actually and he's only come during test days. I mean, really. What the hell? Why would you even bother?"

Dean wiped his eyes and caught Castiel's eye. The more he got to know him, the more at ease his friend became. Castiel's disgust at his students' stupidity was so naturally him. Castiel was also a fantastic teacher, something that was reflected in Dean's current "C" grade in his political science class. Castiel wasn't the mouse that Dean had met last month.

Castiel shifted in his seat and curled his legs underneath him, the way only someone skinny could. Dean felt his eyes drinking him in, the natural curve of his lithe figure, the tousled brown hair, full and perpetually chapped lips, and the glasses that he only seemed to wear while he was working. Dean felt himself swallowing, throat suddenly dry. Why was he just now noticing how fucking attractive this guy was? Why had a lesbian noticed before he had?

"What?" Castiel said, sounding slightly alarmed.

"Cas, can I ask you something? Tell me if this is out of bounds too. But do you like, uh, other dudes?" Dean asked hoarsely.

Castiel snorted. "I've always been told that my appearance makes that relatively obvious."

"So, uh, you do?"

"Well, yeah." He admitted, shrugging a little bit. "I mean, I assume after what happened the other night, that this wouldn't be a problem for you? I kind of assumed you did too?"

"I mean, I don't know, since I was like 20, I've always kind of… kissed who I've liked, regardless of gender or sex. I've been with a couple of guys and it's been fine and I really enjoyed myself, I suppose. But the other night though, so, that was okay?" Dean asked, tripping over all of his words. Why was Castiel suddenly making him feel like a 15-year-old girl?

Castiel shifted some more and rubbed the back of his neck nervously. "Well, it was fine." He said finally. "I'm not going to lie, it surprised me and it's definitely been a very long time for me, but I can't say I minded." He said with a shrug.

"Okay." Dean said, licking his lips, which were suddenly so fucking dry.

"Okay then." Castiel said, blinking a little bit.

Dean returned to his biology problems, mostly because all he was thinking about now was Castiel's mouth, the way his hipbones seemed to poke out of his cords and the way he was sure Castiel was flexible and how much fun that could be in bed. He couldn't focus though, because all of the blood in his brain seemed to have moved down to his crotch and goddamn did he feel like a horny teenage girl.

Dean was staring at a question about XY chromosome disorders when he felt Castiel scoot over on the couch, his face less than 8 inches from Dean. Dean glanced over at him. Castiel had taken off his glasses, but there were still a stack of ungraded tests in his lap.

"Cas." He said simply.

Castiel didn't say anything, just stared at him. Dean couldn't read him, but it was obvious that he was tense, but it wasn't necessarily in the way Dean was used to him being.

Dean chuckled nervously. "Seriously, has anyone ever told you that you stare?"

Castiel still didn't say anything, but his eye seemed to burn hotter. For once, Dean felt himself returning the stare and suddenly knew exactly what Castiel wanted him to do.

"Cas… the way you are looking at me right now. Well, biology suddenly seems like less of a priority." Dean muttered.

Castiel actually growled at him a little bit, which almost sent him over the edge. Dean thrust his homework on the coffee table in front of them and grabbed him and kissed him deeply, almost savagely, sending the papers in Castiel's lap flying to the floor. Castiel moaned into his mouth and returned the kiss with equal urgency. He threw the remaining papers onto the floor and climbed onto Dean's lap, straddling him. He wrapped his arms around Castiel's narrow shoulders and pulled him in closer, and he was caught in a frenzy of hot mouths, tongues, and Dean wanted to devour him, every last inch of him. Castiel's hipbones dug into his waist him like twin prongs and he felt his own hips involuntarily bucking up to meet him. Dean moved his mouth from Castiel's mouth, down his throat, nipping slightly, mostly out of necessity and Castiel let out a yelp, as if he wasn't expecting it. Dean sucked at the sensitive skin between his shoulders and neck and Castiel let out a guttural groan. That noise alone made Dean to return his mouth to Castiel's, because if he made that noise again, this would be over in seconds. Castiel wrapped his legs around Dean's waist and kissed him sloppily. Dean kissed him back and then had to pull away because he had to breathe and the couch simply just would not do for the things he wanted to do to the other man.

"Bedroom." Dean hissed. "We are going to go to your bedroom."

Castiel nodded and began kissing him again and Dean was left with no other choice. Dean lifted him up, grateful Castiel was so light, who giggled and dropped his feet to the floor. Castiel grabbed his hand and led him into the tiny bedroom, almost dancing the whole way. The bedroom was darker and sparsely decorated, and they flew into Castiel's bed, pawing at each other, clothing removed quickly. They were down to boxers, suddenly Dean realized what was about to happen and he had to say something.

"Cas, Cas, wait." He stared down at Castiel, whose mouth was currently on his stomach and was moving southward quickly.

My dick will hate me for this, but I have to say something. Dean thought.

Castiel stopped and stared up at him through a thick shade of eyelashes, eyes wide and filled with lust. Right now, he was almost feral and his body was so fucking lean and perfect and the things he wanted to do to that body were so goddamn sinful that Dean felt dirty just thinking about them.

"What?" He said, hot breath on Dean's skin.

Goddamn. I hate myself.

Castiel didn't move, so Dean leaned down and tugged Castiel up by his shoulders, so they were face to face. He leaned in and planted a kiss on Castiel's lips.

"What did I do?" Castiel said, his voice almost a whimper.

"Oh god, baby, you didn't do anything. You are so fucking perfect." He said hoarsely, kissing him again, not wanting to stop.

"Then what is it?" Castiel sighed.

"We need to slow this down. Believe me, I don't want to, god, that is the last fucking thing I want right now, but it's right." He murmured into Castiel's mouth.

"Why?"

"Because… Cas, I like you. I really like you a lot and I don't like to rush into this with people I like." Dean whispered, kissing him again, because right now, those lips were the most kissable things on the planet.

Castiel moaned and kissed him back. Dean raked his fingers through his hair and held him close, trying not to ravage him more than he already had. He felt Castiel grinding against him, begging for it, and Dean had to pull away.

"Cas." He groaned through his teeth. "Come on, Cas. Keep doing that and I'll lose all of my senses."

"Is that such a bad thing?" Cas mumbled, reattaching himself to Dean's mouth.

"It's too quick. God, Cas. Ugh." He moaned, falling back into the kiss.

"I love it when you call me Cas. I've never had a nickname." He breathed.

Hearing him say those words that made Dean realize that they had to stop. After all, Castiel had never even had a nickname and fucking someone as needy as him this quickly was fucked up and wrong. No matter how much he wanted it, that something Dean couldn't do.

Dean pulled away and sat up. Castiel groaned and flopped backward into the sheets.

"What? What is it?" He whimpered. "Come on, Dean, I want this, I need this. I want you. I promise, I will make you feel so good. "

Dean stared down at him. Castiel looked so fucking hot right now, laying there with his red and pouty lips, heavy-lidded eyes, and his body so ready to submit. To put it bluntly, he looked like he was ready to be fucked. There was no other way to describe it. Staring at him, thinking about it from a perspective other than his dick's, actually sent a cold chill down Dean's spine. Something deep inside Dean told him Castiel had been here before and that he thought that his body only existed to bring men like him pleasure.

"Cas, sit up. C'mere." He said softly.

Castiel blinked, once, twice, and then sat up and scooted the edge of the bed.

"Yeah?" He muttered, looking down at the floor.

"I would love nothing more than to do everything imaginable to you. You know what though? We have time. I want to wait a little while with you because I like you and I want us to have a connection that is more than sexual." He said into Castiel's ear.

"Really? Is that really why? You don't think I'm bad at this? Because you know I can-" Castiel said, turning to him.

Dean cut him off by placing a finger to his lips.

"Shhh, no, no, not at all. Whatever made that stupid idea pop into your head needs to go away. You are beautiful and you are incredibly hot and I absolutely enjoyed what we did tonight. But for now, what we did is enough for me." He murmured.

Castiel didn't look convinced. "Okay." He said finally, nodding a little.

Dean leaned in and kissed him chastely on the lips.

"How about now we go try to finish the work we were doing before you so rudely interrupted it?" He whispered, running a finger over Castiel's bottom lip.

It worked and a laugh escaped Castiel's mouth. They got dressed and went back out into the living room. Dean was actually able to focus on his biology questions now.