--Disclaimer---
This story is entirely fictional and is strictly for entertainment purposes.

“Hey John, you made it!”

“Hell yeah, I wouldn't miss your birthday dude!” I replied. 

I had just stepped through the door of Mark's giant bedroom and game room combo. On the couch near the massive 72 inch TV were our mutual friends Josh and Alex. All three of them were already lounging in their boxers and snacking on a big bowl of pretzels. 
It was Mark's 15th birthday and the 4 of us were all together for a sleepover. Despite being the oldest we were all in the same grade. Mark's birthday was so early in the year, he didn't make the cutoff for ages when we all started school in kindergarten. Alex and I were both 14 and Josh was just a month behind me still at 13. We were such a strange bunch of ages, but hey I guess that's 9th grade for ya. 

Mark lived with his grandparents, but actually had basically half the house to himself. Their home was a strange split level with two different entrances connected by a staircase on the outside. While there was an indoor set of stairs, they rarely used it as it connected the two bathrooms for some weird reason. This gave Mark nearly complete autonomy outside of meals, and even better was the perfect spot for our frequent hangouts. We weren't really troublemakers and Mark's grandparents trusted him so these nights were some of the best ever. 

Tossing my sleeping bag in the corner, I quickly stripped to my boxers as well joining the others on the couch. It was late in the summer and school had just started. Being on the top floor, Mark's room was one of the hardest to keep cool. He had a small window a/c unit, but that didn't do much to cool off 4 teenage Labrador pups. 

“How was the game last night?” I said, grabbing a handful of pretzels and sitting next to Alex. 

“Ugh, we lost to Willow Hills again!”

“Well that blows.” 

“Yo guys!” Mark said, getting our attention as he pulled a DVD from under his pillow. “I got it!” 

“Whoa, really?” Alex perked up, leaping from the couch. Josh and I also stood, but only out of curiosity. We had no idea what got the others so excited. “How'd you sneak it out of their grasp.” 

“Wasn't that hard. I just waited until they were asleep.”

“What are you guys talking about?” I asked, trying to see what movie he was holding. 

“Hehe, check it out John.” Mark tossed me the case and Josh and I got our first look at the title. “Human House.”

“Whoa this is the one with the crazy frat boys right!?” Josh said excitedly. “There's like tons of boobs in this movie!”

“That's right,” Mark replied, confidently. “Now that everyone's here, what do you say we fire it up.” 

“Yeah!” Josh, Alex, and I all shouted. This was our first R-rated movie. As a bunch of teenage boys we were thrilled at the prospect of any topless scenes in a movie. It was hard not to be obsessed with a room full of nearly naked sorority girls, even if it was only a movie. The three of us eagerly took our seats on the couch as Mark fired up the DVD player. We all bounced with excitement, our Tails wagging fast as the opening credits rolled. 

The first 45 minutes of the movie were mostly uneventful. We all got a good laugh out of the dirty and raunchy humor the characters were engaged in. As one particular scene began though that all changed. With our eyes glued to the screen we watched as 8 girls pulled off their bras and began a gleeful pillow fight. My dick almost popped straight out of the fly in my boxers as soon as they began tossing pillows. My friends as well quickly all sported tents in their underwear. 

“Oh man, this is fuckin’ hot.” Mark said, his right paw slipping into his shorts. “Sorry guys, I gotta do it.” The three of us glanced at Mark out of the corner of our eyes, but thought nothing of it. Josh ended up joining him in masturbating under his boxers after a few minutes as well. Eventually Alex and I joined in as well, though the two of us were more hesitant at first. 
After about 5 minutes the 4 of use were leaning back, pumping our hands more furiously. It ended up being Alex who was the first to take his underwear off. 

“Screw it, we've all got the same stuff,” he muttered frustrated by the barrier preventing him from moving his paw faster. Lifting up his butt he quickly pulled off his shorts and threw them spectacularly across the room. Now spreading out his legs more, he pumped his fist up and down freely.

Mark grumbled a little before whipping his boxers off as well. “Oh wow, that's way better! Come on guys, just bite the bullet. No judgment here.” 

Josh and I glanced at each other and shrugged. As soon as I saw the 13 year old reach for his waistband I took a deep breath and got naked as well. It should have been more awkward, but it's not like we hadn't seen each other naked before. Plus there were still nearly a dozen hot college girls on the TV. As Josh's boxers hit the floor with mine, he perked up a little and looked over at Mark. 
“Dang man, you're pretty big!” 

“Huh?” Mark said, the compliment about his dick breaking all three of us out of our trance of self pleasure. “Oh, I guess.” 
Our hands all seemed to slow down at once as the three of us were now staring at Mark's erection. He was clearly the biggest among us, around 5 and a half inches. Strangely Mark seemed to like the attention. His dick twitched, knot starting to swell as his sheath slipped around it. 
“You guys wanna compare yours?”

“Y…yeah,” Alex mumbled, and he knelt up on the couch. Mark did the same as Josh and I watched them put their dicks side by side while facing each other. Alex was about an inch smaller, but his knot was the same size. 
“Hrmph “ he grumbled, feeling inadequate. “Well I guess since you are a year older anyway. Come here John, let's see yours.” 

My heart was pounding with nervous excitement. I stood up and walked to the edge of the couch. The tip of my dick pressed against theirs, a dribble of precum escaped each of us. 
“Hey, not bad!” Mark said, wiggling his cock so it was hitting my mine. “I know I'm like 5 and a half so you've gotta be 5 I bet!” 

“T…thanks,” I mumbled. 

“Me next!” Josh exclaimed, forcing himself between me and Alex. We all chuckled a little as it was obvious Josh was the smallest. He couldn't have been more than 3 and a half, but was super proud of it regardless. 
“Haha, guess I lose.”

Hearing that made the 4 of us bust out laughing. Our dicks still rock hard and twitching bounced and smeared our collective precum together, which felt amazing. Nothing could have prepared us for Mark's next move though. As our laughter died down, he reached down and started giving Alex and I handjobs. While we were both stunned the sudden spike in pleasure caused us both to let out a long moan. Josh's eyes lit up and he reached out with both paws and pumped them up and down on Mark's length. Alex then reached around Josh's back and returned the favor to him as well. 

There we were, 4 teenage boys giving each other handjobs and loving every second of it. As we stroked the moans became louder and louder. Our tails wagged furiously from side to side. Panting as we slowly brought each other to climax. Alex was the first to pop off. Pretty much without warning he let out a yelp and sprayed Mark’s left paw with a few spurts of cum. Mark chuckled as Alex fell back onto the couch completely spent. With Alex’s cum still all over his paw, Mark reached out and grabbed Josh’s dick to continue to pleasure him. Feeling a new hand on his cock plus a little of Alex’s cum caused Josh to convulse into orgasm himself. His boyhood throbbed and his knot swelled up but despite the shivers, it seems he wasn’t able to produce anything yet. We could have called him out about it, but it was clear the dry orgasm was easily the most intense one he probably ever had.
Seeing Josh’s little member throb without releasing sent me over the edge, and luckily Mark wasn’t far behind. Just as I replaced Josh’s hands on Mark’s dick, I yelped, spraying my cum all over the back of the couch. Mark squeezed the base of my knot sending waves of wilde pleasure through me. I must have shot at least 9 times! It was way more than I ever had before. Mark giggled followed by a deep “ungh!” as his cum blasted from his cock landing in the thin space between Josh and Alex on the couch.

Although my knees were weak, I managed to remain mostly standing. I rested one of my back paws up on the table by the couch to balance myself. Meanwhile, Mark rested himself on his heels, while Alex and Josh laid side by side. Breathing heavily the 4 of us slowly eased back to reality from our shared experience. Seeing all the cum stains on his couch, Mark began to chuckle. That chuckle became a laugh as he pointed out the dark stains surrounding all of us. This was more than enough to get us to start laughing all together. 

“Hahaha, oh man that was so gay!” Mark laughed. “I go get some cleaners or something.” Getting up from the couch he slipped on his boxers and went to get some wet towels. 

“Oh dang, looks like Josh is out cold.” I said, seeing the 13 year old curling to one side. 

“Haha, little guy can’t even cum yet.” Alex replied, sitting up. His gaze went from Josh’s smaller body to mine and he smiled. “Not like you though. That was a crazy load, dude!” 

“T…Thanks.” I said, rubbing my right ear a little. “I can’t believe you came all over Mark!”

“I know right! It was so hot!”

“Hehe, yeah I guess it was.” While I didn’t realize it at the time, Alex was checking me out as we waited for Mark to return. With low hanging eyelids a cheeky smile crossed his face. I was mostly oblivious, but still couldn’t stop myself from staring at his dick as it slowly slipped back into his sheath. It was clear that both of us were pretty hot for each other. 

After Mark returned we helped him clean up, and decided to call it an early night. Since Josh was already asleep we just let him sleep on the couch. Mark returned to his bed on the far side of the room, which was out of eyeshot of the rest of us. Alex and I, not saying a word, set up our sleeping bags right next to one another on the opposite end of the room from Mark and Josh. We were curled up by the far wall side by side. The two of us were a little disappointed the night had ended so early, but we did have all of the next day to hangout too. It wasn’t long before we could hear Mark snoring on the other side of the room. Alex and I were still laying on our backs on top of our sleeping bags and still naked. Mark was the only one who bothered putting his undies back on, but that was just in case he was seen going downstairs for cleaning supplies. It was only once Mark had fallen asleep that Alex started talking more.

“Hey John, can I tell you something kinda weird?”

“Ha, kinda weird? What do you mean?” I laughed, not knowing just what he was going to say.

“I uh…I think I’m gay.”

“You…really?” I sat up, leaning on my shoulder turning his way. 

“That was so fucking hot earlier. I…I totally wanna do that with you guys again.”

“Hehe, I guess it was pretty fun.” I laughed. Strangely, I wasn't bothered by Alex’s confession. Though I wasn’t ready to admit it, I did find Alex really hot. Just being able to see his sheath and balls in the open air was really cool. The tip of my own dick hadn’t ever fully slipped back fully in my sheath since our group session. I guess I was still pretty turned on myself.

“Do you know what a blowjob is?” Alex asked.

“Y…yeah?” I stuttered. 

“Can I give you one?”

I was stunned. Yeah Alex was hot, but now he was asking to blow me!
“R…right now?”

“Those guys sleep like rocks. Come on, John. Just lemme try.” 

“S…sure. Ok.” Needless to say, I was nervous, but super excited too. I never would have guessed I’d be getting my first blowjob from a boy, let alone my friend Alex. Sure the two of us were close, but this was a whole new step in our friendship. I propped myself up on both elbows and watched as Alex crawled over to my waist. Reaching out with both hands he rubbed up and down my thighs while nudging his muzzle against my sheath. I let out a soft gasp which caused him to smile and shush me. 

“Hold your hand over your maw if you have to. We don’t want to wake them up.” 
I nodded and he continued. Sniffing at my balls, he stuck out his tongue and licked across my tip which was still poking from my sheath. Gritting my teeth to keep myself from being too loud, I moaned into a hum. Running his right paw up to the base of my sheath, Alex squeezed gently causing my cock to pop out and start getting hard again. As my 5 inches poked from its fuzzy prison, Alex took the whole thing into his muzzle and slurped. My head fell backward as I felt his tongue roll around my entire length. It was the most amazing feeling ever! Soooooo, much better than just getting a handjob. I was so surprised that Alex had taken everything into his mouth too. 

“Shit dude, have you done this before?” I whispered. 

“Naw,” he said, slurping off me to talk for a minute. “I’ve just been thinking about it for a while.” Returning to sucking me, Alex closed his eyes and just enjoyed the taste of my boyhood in his mouth. The more he ran his tongue round me the better it felt. It had only been maybe an hour since we all got off together but I could feel myself already close to another climax. 

“Oooooh. Ahhhh. Faaaaa…shit dude, I’m…I’m gonna cum.”

Quickly pulling his head back, he reached up with his right paw and jerked me the remaining way. He later told me that he wasn’t quite ready for a mouthful of another pup’s cum, which was understandable given my sizable load from earlier. He giggled as he saw my toes curl and knees arch up. After my last climax I didn’t have as much cum this time, but still managed a good 4 spurts. Alex was keen to point my dick up at enough of an angle that it sprayed all over my chest. Probably for the best on easier cleanup. 

As I fell back into a more relaxed state, I couldn’t help but look more lovingly at Alex now. He could tell that opened me up to him a lot more as he leaned his muzzle closer and closer to mine. After everything that happened neither of us were thinking about being gay or whatever. Our lips parted and tongues connected as we shared our first kiss. It was short and fumbly, which was followed by a giggle. Then we tried again. Taking a deep breath our tongues danced together. I could weirdly taste my own cock on his breath, which was so cool. After a few minutes of making out, we were both finally tired enough to fall asleep. One last slip of the tongue and we said goodnight and slipped into our sleeping bags. 

–

I imagine you probably are thinking this was just the end for the 4 of us. Thankfully that’s not quite the case. Over time Josh and Mark became more open to experimenting as well. Our monthly sleepovers became more and more interesting as we worked our way through high school. Though we all would end up dating girls pretty much exclusively by the time we graduated, those few years were still some of the best in my life. We all would eventually end up having sex together once or twice before we turned 18, and it was wonderful. We still talk these days, but those sleepovers rarely come up in conversations. At least once I’d like to have just one more night with my friends though. Just one more time where Alex, Josh, Mark, and I strip off our clothes and fuck like wild pups in the night.