Out Of The Textbook
[Reference Guide]
[Class 3b]

"The sexual capacity of a goldfish is around point four ounces in eggs, and as the swim rate slows with that breed, seahorses show a remarkable capacity for speed and strength during courtship..." 

I glanced in at the young pup through a crack in his door, and smiled. It was nice that he was finally learning something useful. I had heard that the sex ed classes were going well, although when I expertly probed my brother earlier that night, it seemed he had only been learning about... well, less-than-practical stuff. 

He was so tired and so numb that he barely felt his chin slip away from his paw.

He felt it hit the desk, though. I winced at the sound of jaw-to-wood, and decided to make my presence known. A subtle cough should do it, I reasoned, while not surprising him. 

I coughed.

"W-WHAA!" He yelled, so startled that he flung himself and his chair backward onto the floor. I tried hard not to smile, but... well, it was pretty funny. 

"Sorry, I didn't want to scare you." I said, helping him up. He glared at me, his eyes darting from my mouth (which was a second away from bursting into laughter) to my eyes. 

He pulled his chair back up, muttering something about laughing. I ignored it. 

"So, what're you studying tonight?" I asked. It's pretty rare to see him actually fall asleep during homework. Normally he had an unhealthy obsession with finishing it; I had started to worry that my brother had grown into some kind of nerd.

"Sexual reproduction in fish and mammals." Casey replied, running his paws down his face. 

"It... doesn't look like you're learning much."

I glanced at the textbook, and was shocked to find... well, sexual reproduction of fish I suppose. The pictures, what few there were, were just of small fish and eggs, with only one illustration of actual mating. Even then, it was a cross-section. 

Sitting down by his side, I decided to quiz him. "Okay Casey, how do gold fish ma--" 

"One lays the eggs, the other fertilizes them." He said, answering my question before it was asked. "Alternatively, the female holds the eggs inside its body for too long, and explodes." 

I blinked. Okay, maybe he was learning something... practical. Exploding fish. 

"Uh, okay. What about mammals?" I asked, shaking the image of Nemo exploding into a million eggs out of my head. 

He looked at me weirdly, as if I were a toddler asking him what clouds are made of. 

"What ABOUT mammals? They don't typically explode." He said, opening yet another book on his already cluttered desktop. "Unless you count birth, I guess." 

"N-no, Casey. How do they mate?" 

Trying to get to the point without indicating it was proving difficult. Casey was an intelligent boy, but when it came to things that weren't in text books, he became shockingly dense. 

He looked me in the eyes, and adjusted his nerdy glasses slightly. They were similar to mine, just more... well, nerdy. With a haze in his eyes that spoke of fifty-hour study sessions, he sighed.

"Big bro, what're you getting at? I can tell you want something. I'm trying to study here." 

I was a little taken aback, I'll admit; in retrospect I may have come off a bit... intrusive. 

"I have a test on monday." He said, punctuating his point. 

"Well excuse me, Cassy." I replied, smirking slightly. For the first time that night, I saw a spark in his eyes. He slammed his paw down on the desk and stood up, making the small golden heart on his collar jingle. I stood up too; I practically dwarfed him in hight. 

"My name..." He said, glaring up at me. "...Is CASEY." 

I looked into his glasses and smiled; though, not for the reason he thought I did. He smiled back as I studied his body, and the clothes that hid it from me. His pink outfits had become a regular occurance as of late, and frankly I couldn't be happier; they're girly, cute, and just revealing enough to keep me up at night.

"Whatever." I had suddenly remembered what I had come in for. "Maybe I can help with your studies, your textbooks seem to be missing some stuff." 

Casey slouched back onto his pink chair, his matching jeans catching on the side slightly, pulling them a fraction of an inch down. Thankfully, a fraction of an inch was enough; I spied the laced fringe of his pink undies just before he pulled his  jeans back up. 

"My textbooks are brand new." He said, snapping me out of my daze as he idly flipped the page of the book in front of him. 

"That doesn't mean they know everythin', bud." I replied. Kneeling by his side once more, I looked into the book he had and flipped forward a few chapters. Not once did I see anything more than frogspawn or very small animals being described - in other words, nothing useful. 

He glanced over to me, letting out a soft yawn. I knew he wasn't tired enough to sleep. I figured he was bored, and let my eyes darted over his tight jeans. It was only for a split second, and I didn't think he'd caught it... until his paw moved over his crotch. 

It was only for a second, just as my glance was, but I saw his fingers dive subtly for his crotch and give it a swift stroke. I supposed that this was my opportunity.

"Reproduction of higher mammals." I stated as I stood up and crossed my arms. I watched him flick curiously through the book before turning his adorable ruby eyes toward mine. 

"That's not in the textbook." He said flatly. 

"No, it's not, but sometimes you have to learn stuff that isn't in textbooks." 

He shrugged, and turned back to his desk and treating me to another flash of his peeking lace undies. Getting a little frustrated at his constant snubbing, I decided to spice things up a little in a way that may better grab his attention.

"What do your books say about euphoria?" I asked, smiling once more. I could feel parts of my body begin to tense up slightly as thoughts of 'teaching' and lace raced through my head, but I tried not to let it show on my face. 

"Uh... it mentioned somewhere that animals feel it when they mate, I guess. So what?" He asked, turning back to me. 

"If you smile any wider, your face will rip right open." He added. I ignored that part and tried harder to cover up my lusting.

We looked one another in the eye, and I could tell I wasn't the only one getting tense. "Do you wanna know how it works?" I ask, my confidence fighting the blush off of my face. 

"How what works?" He asked, so innocently that I swear he did it on purpose. Maybe my little brother knows what makes me tick, I thought. 

"Let me show you - lean over the desk." 

He showed some apprehension, but with a glance at my knowing smile he did as I had asked. Scooting the chair back, he laid his elbows on the desk and looked at me as if asking for approval. I gave a short snort and slid behind him.

"No," I said, standing up and patting his tightly bound buttocks gently. "All fours."

"Uh... what are you gonna do?" He asked, more out of curiosity than anything else. I gave his ass what I hoped was a reassuring pat as he lifted his knees individually onto the desk. 

"Call it a practical lesson." I said. 

My eye caught something on his desk - some homework he hadn't told me about. It was just a piece of paper, but it was titled at the top "Sex Ed - Explain the mating process:".

The rest of the paper was blank. Figures, I thought. I got snapped back to the lesson at hand when Casey's blue tail brushed my cheek. He seemed to have a habit of keeping his tail up, which was odd considering the canine family's typically limp tails.

I shook my head and tried to focus. "Okay," I said, unbuttoning the tail strap on his jeans. I spoke with authority of an older brother before he could protest. 

"So have you heard of 'foreplay'?"  

He looked back at me with a blank, slightly crimson-hued expression. I sighed inwardly; what were they teaching in school these days? 

With one swift action I'd practiced a million times in my dreams, I tugged his surprisingly tight jeans right off of his legs. The sudden action made him a little unstable, but he recovered rather quickly - and after I'd tossed them to one side, I was greeted by the finest sight my eyes had beheld. 

There, being presented below a happily wagging tail, was a fine teenage set of buttocks, framed beautifully by bright pink underpants. It was so cute, I almost hugged him. They even had a red heart in the middle, although to my eyes at the time it looked rather more like the centre of a target. 

"U-uh... big D?" ...Bastard. He knew I loved to be called that - he only did so when he was in trouble, or wanted something desperately. Rather stupidly, I wondered which it was at that moment. 

"Yes?" I replied, trying my best to hide the grin from affecting my voice. 

"Wh... what do my jeans have to be off for?" He asked, this time with genuine concern. I thought for a moment... the fact that he didn't simply hop off the desk told me more than I needed, but if that wasn't enough, there was also the slightly... wanting tone in which he'd asked that last question. 

"Well, that's how foreplay works." I ussured reassuringly, sliding one finger of each paw just under the elastic of his cotton undies. I felt him tense up a little, and paused for his benefit. 

"You don't see animals in the wild wearing clothes, right?" 

"W-well... no, but--" I tried to cut him off before he could make up some smart-alec response. 

"Right! And fish don't wear panties, so let's get these off." 

He certainly didn't complain, although he did wiggle his hips with a mix of seduction and nervousness as the pink fabric began to slide down those ample, bouncing cheeks... and oh, were they bouncy.

Every inch I uncovered was like unwrapping christmas. Every hair on this cute boy's butt was so preciously set in place and immaculate that I almost felt it a travesty that it wasn't shared with the world...

Still, I didn't let that stop me from enjoying it in private. With a swift yank, they were down to his knees - and with a little begrudging help from my 'student', they were fully removed. I tossed them carelessly onto the desk amongst his books.

I had what I wanted. 

"S-so..." He muttered, no longer looking back at me. I paused, my tongue hanging out of my maw and an inch away from those divine buttocks. "What's the scientific name for foreplay?" He asked, as if still keeping up the spurious excuse of learning something. 

I admit, I almost panicked. What was I meant to say? I could have dove right in and simply ignored him until he started moaning, but then what kind of teacher would I be? Let alone what kind of brother...

I pulled my tongue back into my maw and gave the first answer that came to my head. 

"The uh... right. The scientific name for foreplay is... pre-intercourse alteration of fluctuate sexual functions." 

...I blink.
I was surprised at myself. Even though I heard him snigger, I knew he'd accepted my answer - as he should! It was a damned fine answer. Speaking of damned fine, I didn't waste any more time with his silly questions and impertinent interruptions. My tongue leapt freely from my maw as if it had a mind of it's own. My paws grabbed each of his legs, spreading them slightly across the desk as I dove my face forward. 

At long last, I hit my goal. My tongue ran roughly over his cheeks, messing up his perfect combing pattern and blurring the line in his fur, made by the family pattern so elegantly making a heart shape on his ass. I felt a droplet of sweat on my brow - the heat of the situation was getting to me, but I'll be damned if that'd make me stop.

I gorged myself on what I could - as if a slimy, slithering snake through a suspiciously tight swamp, my tongue wormed it's way between his cheeks. My paws stretched them apart slightly, and before I knew it, my ears were catching soft moans from the other side of this perfect rump. 

Knowing I couldn't stop to ask if he was okay, I simply let my instincts kick in. I buried my nose against the base of his tail and ran the tip of my tongue around his entrance, which twitched tightly in response. Each time it did, I felt my trapped hardon getting harder and harder to ignore.

Still, I did my best. 
I spent a few minutes licking away, lapping at exposed entrance and occasionally teasing it open. I never fully dove in - at least, not yet. Partially to catch my breath, I pulled away. 

It was only once I had a moment to sort my thoughts that I noticed something I hadn't before - Casey was shaking. It wasn't one of fear, nor was it shaking from coldness, he was just... shivering. 

One of my paws dove under the desk and unbuttoned my jeans with one swift movement, finally granting relief of the pressure that had been building up. Still... I'm not THAT much of a dick to my 'lil brother. 

"Are you okay?" I asked, genuinely concerned. 

He slowly turned his head to look back at me. His eyes were almost hidden by his fringe, but the look in them was powerful enough to pierce led. The blush blessing his delicate features was unmistakable, and his trembling lip was held up by one corner only because he was biting it. 

He didn't say anything. He didn't have to, and he damn well knew it. 

With my cock finally slipping free of my oppressive jeans, I got right back to work on his backside - stuffing my nose under his small tail and pulling his legs apart a little more as my tongue once again went spelunking.

I didn't waste any more time with teasing. Burdened with fierce dedication, my tongue tip pierced his ring and pressed up against his sensitive ring. I heard a not-so-soft moan from Casey, and had to stop touching myself. At this rate, I'd never last... 

Still tongue-deep in my little brother's tight, steamingly mountable butt, I groped blindly for his other buttcheek. I accidentally brushed something wet and heard another loud moan. Naturally, I pulled back to investigate - and found something that stirred a deep, burning desire inside of me. 

His cock, once hanging freely since the panties were removed, was rock hard. Not only that, but it was leaking pre all over the desk below him - fortunately not on any books, but... well, his panties would take some washing. 

With both of his buttocks now stretched apart, I dove my tongue in once more. My lap-happy slurping filled the room, punctuated by his moans of ecstasy. Soon I heard him speak, and had to pull back with great reluctance. 

"What was that, 'lil bro?" I asked, before ploughing against his rear end once again. I forced my tongue deep into his tight, wanting inner ring before he answered, making him moan out a false-start.

"I-I... Aa--ahh..." 

He tried again, this time taking a concentrated, shaky breath. 

"I-is this how it works, bro?" He asked. He didn't bother masking the enjoyment in his voice, and I didn't bother pulling away from his burning inner sanctum. 

"Uh-huh." I mouthed, licking broadly up against his entrance. He squirmed under my grasp, and I have to admit that it only made me want him more. Still... there was more to be learned here. 

For the final time, I retreated my head from between his two perfect, fluffy cheeks. He protested with a loud whine designed for a wanting lover rather than a little brother. 

"N-now, that was... uh..." 

"Foreplay." He answered, and rather huffily at that. He slipped down from the desk and crossed his arms, his cock twitching stiffly in the air as he did so. A small bead of precum ran down it's length, making him shiver slightly more. Evidently, he was rather close... and as his big brother, I couldn't just let him go on like that. 

"Right. Just testing you." I muttered, glancing down at my own hard, wanting cock. The path from there seemed naturally clear. 

"Casey, I think it's time you learn about safe sex."

His face dropped. "Y'mean what we did wasn't safe?!" 

Once again I found myself at a loss. Scrunching up my eyes helped; the less I saw of his adorable, petite yet perfectly proportioned teen body, the better I could think.

"What we did wasn't sex, Casey. Lay down on your bed on your back - what I'm about to show you is gonna rock your world." 

He did so, almost with enough vigor that when he did jump onto his bed, he almost slid off the other side. He righted himself while I stood a foot or so away from him, gently stroking my shaft and biding my time. It was very, very hard not to just give in and plaster the little brat in my hot, brotherly love there and then... but there's his education to think of, y'know? 

Finally getting himself into the right kind of position, Casey looked up at my with a grand smile and an infectious blush. He lifted his legs nervously, almost as if he'd done this kind of thing before, even though I'm sure he hadn't. 

I pulled my wallet out, which kinda confused him, and then the square piece of metal wrapping. He tilted his head cynically. That was quite adorable, too - this young, supple boy, his hard cock dripping onto his belly, looking cynical. 

Cute. 
Still, I was about ready to burst with how sexy he was, especially with him staring at me like that. So, I tore the wrapping open and quickly discarded it. I let him watch me put it on, too - walking over to him so my cock was hanging over his head as I rolled the thin, lubricated rubber over my stiff cock. 

"Roll your shirt up." I commanded, murring under my breath. He obeyed without hesitation or question, still staring up at my newly-wrapped-up cock with those big, curious eyes. I pulled each of his legs up to either side of me, and kept a paw on one of them as I aligned myself. 

"Now, bite into your shirt, 'lil bro. This might hurt a bit." I muttered, pressing my tip against his eager, lubricated entrance. 

He winced slightly, but bit down just as I asked... not without protesting, though. 

"Rfff! Why do I have to hold my shirt up for you to get the... the uh..." 

"Condom." I corrected, grinning down at him. His cock twitched, thumping against his belly as I ground my tip between his ample cheeks once again. "The word is Condom, Casey, and because I'm your big brother and I know better." 

With that matter settled, I decided that it was finally time to 'educate' my 'lil brother. With a soft intake of breath, I lined up my tip, pressed it against his entrance, and as soon as I was sure it was in the right place, muttered softly. 

"Now bite down... hard."  

I didn't wait for a response. My nervousness was showing blatantly in my face, but I pressed on - forcing his tight, young entrance around my invading cock. There was a moment of resistance, and then it happened - I pushed inside, half of my shaft sliding neatly into place. I moaned out, no longer caring if I showed my true colours, and was happy to hear him join me.

Deciding to check on him as I moved my cock-steadying paw to support his leg, I glanced up to him and was struck by his beauty. I hadn't really noticed before, but looking at my little brother's exquisite, exposed body as I held myself inside him... it sent pleasant shivers down my spine. I felt my tale wagging behind me, and smiled down at him.

Even though he was biting into his shirt, he managed to grin up at me, too. Only one eye open, he urged me on. I even felt him tighten around my tip slightly, making me moan out once more and quiver with delight. 

"A-alright, Casey... here it comes." I muttered, pulling myself into him by his thighs. I cannot use words to describe how good it felt to finally have my shaft nestled inside his tight, burning hot ass... but the sounds I made at the time apparently spoke justice. I went pretty slowly at first, but couldn't hold back after that - from his thigh-high pink socks to his effeminate body, currently being painted by his dripping cock... it was just too much. 

I had the decency to wait until I'd fully hilted him, making him moan out my name and squirm under my grasp. I began to pull back, but once I got about half way out, I slammed my hips forward, ploughing roughly into Casey's fine, unsuspecting backside. 

THAT made him yelp out. I uttered a quick 'sorry', but my smile gave me away almost as much as my raging hardon did. I didn't stop; I pulled out faster and got a little further out before once more driving home. He yelped out again, but this time out of pleasure rather than surprise. 

"Mmf... gettin' used to it, buddy?" I asked. After all, I didn't want to break my poor brother just yet. 

"A-ahh... I--ahhh..." Between pants, all he could give in place of feedback was a series of primal moans.

Figures, I thought to myself. He couldn't even speak with how much pleasure he was under, and after a few more hilting thrusts he stopped trying. I didn't mind; the loud slaps from his moist hips against my legs was more than enough to drive me forward. I felt his tail run up my leg, and brush against my heavy, swinging sack - that made me squirm and almost lose it right then and there. 

With enough force to make the pup wince, I pulled out of his wanting backside. I unceremoniously rolled him over, roughly grabbing his back and forcing his legs apart with my own. He was still on the bed, but only because I decided his butt needed the hight - his legs weren't quite as long as mine, and his knees on the mattress made the perfect hight for my cock to push between those deliciously welcoming cheeks.

Considering that, it's just what I did. He moaned out my name once more as I did so, and I saw him grabbing desperately at the sheets on the bed out of pleasure. I smiled - his squirming and moaning only turned me on more. 

Soon, the sound of wet slapping of thigh-against-ass filled the room once more. I drove my shaft mercilessly into his welcoming, convulsing rear, although he never once protested. Rather, he begged me for more, calling out my name with every laboured breath he had in his small body. 

"B-big... brother..." He chimed out. I'd noticed that after I'd pulled him in for a series of short, hard thrusts, he'd started pushing back by himself. I barely needed my paws on his hips... at least, in theory. Instead, I grabbed him by the waist and slammed home, deeply hilting him like a sword into a scabbard. Casey moaned out in the adorable, high-pitched way he does when he can't control himself.

I was just getting ready to warn him of my upcoming climax when I felt an outer-worldly tightness around my shaft. I almost stopped thrusting in so hard... almost. He called out my name and sat up straight, almost throwing me out of rhythm. Thankfully, I was able to grab him around the chest with both arms and continue forcing my thick meat in. This new stance meant his ass cheeks squeezed around my entire shaft, even when I pulled out for another hit! 

With my paws covering his chest, I decided to play a little more. He still had his shirt up, even though his jaw had slackened to the point which meant his tongue was lolling out in pleasure. That changed quickly when my paws found the small, slightly stiff nubs along his chest.

"AHh!" He called out, clenching his jaw and letting out a sweet, deliciously innocent whine. Evidently, his nipples were... sensitive, to say the least. I filed that under 'interesting' for later, and instead wrapped my arms around his chest again. I was close; I could feel the pressure building up not only in my lower stomach, but also in my balls. Every time they hit the back of his legs, it jolted me a little further up the mountain of ecstasy. 

"Grr... C-casey, I'm gonna..." 
I didn't finish sentence. Just as I had begun to warn my little brother, I felt his hips push back against my own - and then forward, again and again. It was at a pace even I wasn't able to keep up with, so it led to me simply holding his back roughly against my bare chest and moaning out loud right next to his big, perky ears. 

I couldn't handle it. The pace, the effeminate moaning, the heartbeat I felt against my chest as if it were my own... my primal instincts took over. I'm not sure how long it lasted - maybe a moment, maybe an hour. All I know is that I pushed him down hard onto the bed, pinned his arms and legs down with my own and bruised his backside with my rampant, rough fucking. There was a moment of lucidity where I heard him begging me to finish inside him... as if I had a choice, hah. 

When eventually I came to, my body was a wreck. I was still thrusting into his shockingly still-vice-like ass, but it was as natural as breathing now. I felt the pressure that was present before, only it had... changed. It was burning hot, like lava leaking out of my solid cock. I couldn't tell you if it was a wave, or if it was a sudden explosion, but one way or another I knew what I had to do. 

So, I did it. I hilted him one last time, with both of our legs splayed like starfish and his arms pinned around his back. The bed had dented the wall pretty badly, but the feeling of release was well worth it. I had to stop myself biting his shoulder, it was that powerful - like an eruption of sexual desire, I felt it fill him up to the brim. Shot after shot of thick, hot canine cum filled Casey's fine ass, until it began leaking out - even then, I continued thrusting, albeit at a much slower tempo. Every drop inside me was pumped into his well-used inner walls, painting them to the point of leaking out onto the bedding below and soaking it in our combined love juices. 

I must admit, I haven't experienced paralysis like that before. As I collapsed on top of the 'lil squirt, ironically squirting some myself, I couldn't move to save my life. He didn't seem to mind; he was just as exhausted as me, but as I began to drift off into the inevitable darkness of unconsciousness, I heard him speak. That was something I wasn't capable of. 

"I... I love you, big brother." 

When eventually I came to, I found Casey had disappeared. I wearily looked around, and followed the rather unmistakable trail of canine juices leading from the very sodden bed. I found Casey on his chair, writing something. 

I tried my best to get up. On the sixth try, I managed it. I pulled up my jeans, tucking my extremely sensitive length back into it's hiding spot and shuffled over to him. He was so enthusiastically scribbling in his somehow incredibly neat handwriting that he didn't even notice me at first. 

The most I got was a quick glance. He looked up at me, smiling and bright-eyed, and got back to writing. By the looks of the papers around him, this was at least his tenth page. 

"What're you... oh." 
I had figured it out. The seduction, the blank paper... the little bastard had conned me! 

"It was all just homework? Really?" I asked. I wasn't really hurt, not even my feelings. I was just glad to be a part of it, and if anything, I was proud of the little scamp for his... tactics.

He stopped writing for a moment and turned to me, wincing a little as his bare butt shifted position. 

"It wasn't... JUST homework." He said, scratching at his perky ear with a grin. "But you really, really helped, big bro!" 

"Well... I'm... glad I could do that for you, Casey." I said, smiling back down at him. I scuffed up his hair, and he got back to writing his essay. Curious, I picked up the paper at the top of the nearby pile and read some of what he'd written.

Explain The Mating Process:
After doing some personal research with a local research partner, I have concluded the following; The alpha of a pack may pick any partner of their choosing. Foreplay, or 'pre-intercourse alteration of fluctuate sexual functions' is then implemented, allowing both partners to fully express their devotion to one another before the main mating ritual. The main mating ritual, although commonly thought to be only of opposing genders, can and often does...

I smiled, and replaced the paper. Slowly, I made my way out of his room, leaving the door slightly ajar. I doubt Casey even noticed I'd left, but as I looked in on the young pup happily scribbling away, one happy thought danced across my mind. 

"Man..." I whispered to myself, zipping up my jeans. "...What a fantastic, sexy nerd. I couldn't be more proud of you, Casey."        
The End…

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