AN: A little fic I wrote a while ago. I might write an additional chapter further on if I feel like it. But for the moment, it's complete.

There might be some typos and alike, as they are insanly attracted to me and follows me around everywhere. Tell me if you find any.

All comments appreciated (except for flames, which will be used to warm my frozen feets)!
Please enjoy your read!

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Jerking off, wanking, masturbating. Of course he knew what the words meant. Sasuke wasn't stupid; he just didn't care to indulge in such frivolous activities which would not cause the sudden demise of his brother. And even if it would off his psychopathic sibling, he would still not do it. The ability to pull at ones penis could hardly be counted as strength, and if it wouldn't help him to get strong enough to avenge his clan, he wasn't interested, simple as that. Sasuke just applied the Ignore-It-And-It-Will-Go-Away technique every time his libido decided to pop him a boner.

This was why; since he himself had little to no understanding why anyone would enjoy tossing off at every chance possible, the late night rustling of Naruto's sleeping bag irked him so much. At first, he'd just dismissed the sounds as nightmares, but after a couple of nights of no one asking him exactly what he was doing, Naruto gained some weird kind of confidence, thinking that they couldn't hear him. Soon, heavy breathing accompanied the sounds of more or less rhythmic movements, and not long after, a breathy moan could be heard a couple of seconds before everything went quiet again.
This puzzled Sasuke at first; he couldn't understand what kind of nightmares would make you moan in an entirely, non-terrified way, and then, after you've woken up, wriggle out of your sleeping bag to sneak away to wash your hands in a nearby stream. That last part could be explained as Naruto having weird ways to calm down, but that didn't explain why he looked so satisfied and happy the next morning. As far as Sasuke knew, there was nothing pleasant about having nightmares, he if anyone should know that.

It was one of these nights, out on a week long mission that Sasuke found himself sleeping down-wind from Naruto. And it was when Naruto struggled out of his sleeping bag after one of these supposed 'nightmares', that Sasuke caught a waft of something that reminded him of what he could smell on his own boxers some mornings, more often then not these days, that came with some white stuff as evidence, either sticky or crusted. Sasuke furrowed his brow and tried to connect the dots as he watched his teammate's back as he tip toed away to the small stream a couple of paces away from the campsite.
When Sasuke awoke from a nightmare, he was usually cold sweating and shivering, and feeling over all miserable. But when he woke with the white stuff in his boxers, he usually felt relived, almost happy. Those mornings, the bright sunlight, streaming through his bedroom window, didn't feel as annoying as it usually did. Neither did Sakura's shrill "Good Morning, Sasuke-kun!" hurt his head as much as it used to.
Why would Naruto move about as if he where having a nightmare, when in reality, he was having what Sasuke had labeled as a 'Good' night? And then there was the part about him always sneaking off to wash afterwards. So unless Naruto saw nightmares as a good thing, Sasuke could only come to one conclusion; Naruto was wanking. Sasuke felt his eyes widen as the realization hit him; Naruto was touching himself, pleasuring himself, while his teammates and teacher lay sleeping (or in Kakashi's case, keeping watch somewhere further off) only a few meters away, often close enough to touch!
Sasuke, although he'd never done it himself, knew that jerking off was something you did when, as Kiba had so crudely put it, you were "Too horny to even see straight," and it was something you should do alone, behind closed doors. Sasuke had not meant to eaves drop on the conversation the boy had held with his friends at the academy, but it was hard when they sat right behind him, talking and laughing loud enough to be heard all the way to Sand country. Sasuke had slipped away after that, but not fast enough to forgo Kiba's declaration that he now only did it outside in the woods, after his sister had walked in on him once and then teased him about it for a week afterwards.
Sasuke watched Naruto through his lashes as he returned and crept back into his sleeping bag, shifted some before relaxing with a content sigh. It did not take long before his breathing pattern told Sasuke that he was asleep.

After that night, Sasuke tried really hard to remain sleeping whenever he heard Naruto starting up with his nightly ritual, but it was close to impossible! It was as if his eyelids suddenly became too short to close completely! He watched as the boy next to him moved, slowly at first, then faster and faster. He listened as his breathing grew heavy and irregular. He awaited that breathless moan that meant Naruto would soon go and wash up. When he finally did, Sasuke closed his eyes and willed himself to sleep. It always took longer then he liked to drift off those nights. Partly because his shorts had suddenly grown too tight for comfort, partly because he felt unusually hot and bothered. But Sasuke ignored it. It would go away on its own, eventually...