The first time it happened was an accident. His evening of research with Stiles had been a particularly infuriating one. Derek would never admit it, but he knew he was next to useless when it came to gathering information and relied heavily on Stiles. Today, though, had been almost too much for his poor werewolf body. The problem could be narrowed down to one thing: Stiles' lips. Of course he had to choose a stupid fucking Popsicle to snack on while he worked. A strawberry cream Popsicle at that, the fucker. The way Stiles' tongue licked up the maddeningly creamy liquid that was dripping down his hands was positively sinful. The way his mouth moved like a goddamn cumslut made Derek grip the side of his chair. Stiles seemed completely oblivious to what he was doing, so all Derek could do was watch and brood silently.

Soon Stiles had finished his snack, to the relief of Derek, but then, to Derek's dismay, began sucking the sticky residue off his fingers. It was far too easy for Derek to imagine those being his own fingers or, even better, something else… Lost in thought, he heard Stiles finally say something,

"Derek? Hellooooo?" He snapped out of his reverie.

"What Stiles?" he snarled out.

"So do you have any bright ideas in that big alpha brain of yours?" Stiles inquired. Derek, frustrated beyond all recognition, snapped. He jumped out of his chair, pulled Stiles up by his shirt, and pushed him against the wall like he had done so many times before. This time Stiles just looked confused instead of scared.

"What did I do this time?"

"Everything." Derek growled and shoved himself closer so their chests were touching.

"Wha-" Derek put his hands over Stiles' mouth, shutting him up and leaned into his ear,

"You don't have any fucking clue do you? What. A. Fucking. Tease. You. Are." He enunciated each syllable, ghosting his mouth along Stiles' ear and down to his neck. Stiles whimpered against the hand that was still covering his mouth.

Derek removed his hand from Stiles' lips and placed it on his shoulder, his breath still hot on Stiles' neck.

"Wha-at are you doing?" he stuttered out. Derek gave the poor quivering virgin a once over and said,

"Don't speak." His hands moved to each side of Stiles, pinning him even more, and his mouth moved up to his cheek, lightly grazing it.

"Just tell me when you want to stop, okay?" Stiles nodded in return, for once in his life unable to come up with anything to say.

It was so hard for Derek to restrain himself. Finally after all these months of nothing but holding back his desire, all he wanted to do was slam Stiles into the bed, rip his clothes off with his teeth, and fuck him face down, ass in the air. Of course he knew he couldn't do that. For all he knew, Stiles had never even seen a person naked in his life. Derek realized he needed to go slow, but that was incredibly hard to do with a trembling, panting Stiles in his grasp. Derek ran his hands up and down Stiles, slowing coaxing his shirt off, while Stiles tugged at the bottom of Derek's shirt and whined.

They hadn't even kissed yet. Derek was still licking and sucking on Stiles' neck and cheek. He pulled back for a moment to look at him and Stiles pushed forward, not liking the lack of contact, and kissed Derek straight on the mouth. Encouraged, Derek began making loops with his tongue in Stiles' mouth. Both boys were now shirtless and enjoying the direct skin on skin contact.

To Derek's surprise, Stiles began kissing and nipping at his chest, slowly, torturingly down. He was shocked at Stiles' forwardness. It must be all the porn he didn't think Derek knew he watched. All kinds of porn. Stiles did not discriminate, gay porn, bdsm porn, regular porn, Asian porn, and every other type of fetish you could imagine. Derek chalked it up to Stiles' habit of researching anything and everything so thoroughly.

Distracted in his own thoughts, Derek was suddenly brought back to reality by Stiles' teeth yanking at his jeans; his hands still feeling his chest. Derek looked down, wait at what point did Stiles end up on his knees? He needed to learn to focus more for next time. Derek reached down to his pants and shimmied them off without even bothering to unbutton them. He glanced down at Stiles, who was looking up at him,

"You sure about this? You don't have to- Oh! Oh fuck, Stiles." His hands had moved from Derek's chest down to his dick. In a suspiciously quick motion, Derek's dick was out of his briefs and into Stiles' hand.

Just feeling Stiles' slim hands begin to stroke was enough to make Derek crazy. He hadn't had much sexual contact in years, other than the occasional shewolf that passed by. He was desperate for it, and it took all the willpower he had not to come right then and there. Who was the virgin here again? Stiles certainly wasn't acting like one, still kissing and nipping at the skin around Derek's hips and lower chest, hands still stroking. His mouth finally moved towards Derek's dick and he danced his tongue around the tip, causing Derek to let out a guttural groan. After a few moments of teasing, Stiles' lips pushed down, down, engulfing the entire cock. It was quite a sight to see, really, those merciless cock sucking lips getting sticky and wet from saliva and precum. Stiles' brown eyes so focused and looking up every once and a while to scrutinize Derek's facial expressions. Derek unintentionally jerked his hips, shoving his cock even further into that little virgin mouth. Stiles whimpered in response and Derek felt the high-pitched vibrations.

"Jesus fucking christ, Stiles." Derek's hands instinctively went around the boy's neck, pushing and pulling so Stiles wasn't so much sucking his cock, as he was being mouth fucked by it.

With a final pop, Derek jerked Stiles head away from his dick and up to his mouth. Tasting himself on Stiles' lips began to push him over the edge and he started to convulse, reaching down to stroke himself to completion. Stiles, gasping for air, tore himself away from Derek's lips and panted,

"Wait no, not yet," he scooted himself back down onto his knees and looked up devilishly,

"Okay, now you can come." The image of Stiles' on his knees, purposefully wanting Derek to come all over his face, sent him over the edge. Spurts of cum landed all over Stiles' jaw and lips and he stuck his tongue out licking it up and swallowing it down. After Derek had coaxed the last bit of cum out of his cock, he pushed his sticky fingers into Stiles' mouth and made him lick them clean.

When it was all over and they were sitting on Stiles' bed, contemplating what they had just done, Derek thought out loud,

"It was that stupid Popsicle, that finally did it. You didn't even know what you were doing." Stiles looked at him mischievously,

"Oh no, I knew. I was sucking it like that on purpose."

"You're going to pay for that." Derek said as he began to forcefully kiss him. Stiles playfully pushed him off and said with a grin,

"Ah, ah, ah, hold your roll. It's my turn next."