[Gay] I Was a Teenage Cambion

MonsterLuvr

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Set in the same universe as I Summoned an Incubus.

Growing up, I knew I was different. I wasn't smarter or stronger than others. I wasn't more or less attractive than others. And while I had an above-average penis, it was HARDLY the biggest or smallest anyone has ever seen. But deep down, something about me was far from average.

But what?

I found that out a couple of weeks after my 18th birthday. I wasn't flying blind while I was fooling around with my favorite friend with benefits. Aiden was the de facto alpha male at our school. The tallest. The most attractive. The biggest muscles. And the biggest cock. Granted, his 9" member was only an inch and a half longer than mine (I was the bottom of the top five in our school), but his 8 and a quarter inches of girth made my own cock (7.5x5") look positively anorexic. But the way he practically hungered for my cock was in no way influenced by the idea of penis size dictating whether one was a top or bottom.

"Slow down, Aiden."
"I can't help it, Damon. I haven't gone this long without that tasty dick of yours in ages."

I turned 18 before he did and it was decided that we wouldn't fool around unless we were both on the same side of 18. But now, a freshly-legal Aiden had plenty of lost time to make up for. He was practically tearing my clothes off. I couldn't stop him even if I wanted to!

Thankfully, we both needed this. As he flung my mostly-average self onto my bed, I looked up to see the high-school wrestling champ pulling his shirt over his head, revealing his sexy abs divided by a light-brown treasure trail that led to a pair of hairy, beefy pecs. He then yanked down his jeans and boxers in one pull, showing off his fat cock. He leapt onto me, kissing me as he ground his crotch against mine, his plump sausage pressed against my Slim Jim. He then began kissing my neck as he began to work to his favorite part of my body. He licked and nursed my nipples as they sat upon my flat yet firm pecs as he kissed down to my tight stomach muscles. He then got a hard sniff of my bushy pubes before running his hungry tongue across the surface of my balls. Aside from my ability to turn this barely-legal stud into a ravenous cockhound, I also had a set of larger-than-usual testicles. Whenever I blew my load, I blew hard and strong. God knows how much of a mess I make every time I jerk my barely legal knob!

He then put his hungry lips to my prick as I slowly did to his. Since mine was so much thinner than his, he was able to suck me off at a much faster pace than I could him. He blew a decent load down my throat after about a few minutes, but I lasted much longer. I decided to blow him again, not stopping until he finishes blowing me. We probably spent the next ten or twenty minutes putting lips to each other, him emptying his balls probably three or four times while I still waited to cum once. At some point, my jaw began to hurt so I just laid back as he somehow started bobbing up and down thrice as fast. His fingers drifted past my lean yet noticeable six-pack abs and up to my nipples. I grabbed the back of his head as it plowed into my pelvis harder and harder with each smash of his face against me. Finally...

"Oh, yes. Oh, yesss. Oh, yyyyyyyyyyyeeeeeeeeeesssssssssssssss!!!!!!"

The first shot fired off from my dick as it spasmed between his lips. He greedily gulped each load, each one bigger than all the loads his produced today combined. Even with me having jerked off three times before school, once during homeroom and a couple of self-sucks in the bathroom during lunch and just after gym class, I still managed to fill his belly completely. He got up and began gasping heavily. I looked up, enamored by his heaving pecs. He was built like a superhero despite only being 18!

He walked over to my free weights, which despite my lean swimmer's built, got plenty of use. Usually, after a load, he'd work out for a bit. The sight of his naked body was practically pornographic but seeing his physique in action was infinitely more so. I never got much use out of the heavier weights, but he certainly did. But then again, since I got to watch, I got all the use out of them that I wanted. Even after expelling more spunk from one blowjob than most people would produce for twenty, I couldn't wait for round two. "So is today the day?" I really hoped that today would be the day that I'd get to bottom for once. But he just smiled and said, "nice try. My birthday, my rules!"

He got back on my bed on all fours, presenting his hungry hole to be fed as the other end has. As I pushed my thin manhood into him, he moaned and cooed in delight. I'd start with light thrusts that'd slowly get harder and faster as time went on. I watched in the mirror in front of my bed, his handsome, rugged face excited to be getting fucked. My lean, hard muscles flex slightly with each thrust. Soon, I was pumping his hole twice as hard. As I kept my eyes locked with his via the mirror, I barely noticed that I was slowly changing. Barely noticed that my shoulders spaced slightly farther apart. That my waist began to taper slightly. That my pecs began to slowly become slightly more pronounced. That each of my abdominal muscles began to push out slightly more. That my arm muscles began to slowly inflate. Or that his hole began to feel slightly tighter. But I did notice the strange shapes twisting and contorting in my periphery, like blood-red eye floaters. And the strange, dark voices. Evil and ancient voices.

"Oh, fuck. Oh, fuck. I'm..."
"Yes, king! Fill me up!"
"I'm CUMMMINNNNNGGGGGGG!!!!!!"

Just like last time, I spasmed with each shot fired, almost twice as many as I fired off down his throat. And twice as heavy. With each twitch, my muscles tightened. My enticing and somewhat larger-looking muscles. But just when I thought I was about done...

"AAAAAHHHHHHH!!!!"

As if by an outside force, my pelvis began hammering away at his ass twice as hard as ever. I bent back, as if pulled by an unseen entity.

"OH, GOD! HELP! HELPPPPPP!!"

I had zero control and before I knew it, my dad barged in. "What's going on?" Tears streaming down my face, I just cried out. "I don't know! I can't stop! I'm scared!" Unfazed, my dad simply told me, "son... you can't stop yet. Trust me, breaking the connection would just make things worse. Don't worry. Everything's gonna be fine." After a while, I felt something. It was like I was cumming again, this time it like the biggest wad was coming out of my dick... no. It felt NOTHING like an ejaculation. Mostly since it seemed to be ENTERING me. It was like all the sperm I shot inside him thricefold was now going back into my dick! And then I was flung back.

I awoke a few minutes later. I had someone staggered to my mirror, seeing someone familiar yet not. It was me, but not me. This me was a few inches taller. WAY more muscular. More squared-off jaw. I looked down and almost didn't see the now jacked legs that grew from my waist, distracted by the nearly foot-long flaccid cock now between my legs. "Holy shit! Aiden, look at this. Aide..."

I looked over. My dad stepped out of the room for a bit. Aiden was sprawled on the bed. But he looked different. Nothing like a jacked man I just fucked. He was skinny with a now-smooth torso that looked like he never worked out a day in his life. Same for his arms and his legs. Speaking of his lower body, his crotch was vastly different. His pubis looked positively bald, as though all his pubic hair fell out. His cock was atrophied to nearly an eight of its original size. It was like something stole all the masculinity out of him.

My dad stepped in and walked up to me.

"When your mother and I tried to conceive, nothing seemed to work. In desperation, I summoned a demon to help us. The demon, an incubus, put his lips on my penis and fellated me. As I felt like I was gonna cum, I just climaxed. No ejaculation. The demon said 'go to your woman and lay with her, but when the time comes, a price will be paid'. He told me that my child would be a half-breed. Part human, part demon. It would have a fraction of the incubi's power. He could give power and take it away, and so would my child. And now that you are of age, you have the power to nourish other men's masculinities... or you can drain them of every drop. The good news is that your friend's condition isn't permanent. Go wash up."

I obeyed him, going to wash my new body. Even with all that's happened, I couldn't help but enjoy all this new strength. As I brought the soap across my body, I grew hard immediately. My newly hairy chest was broad. My pecs about as big as Aiden's were, and just as hairy. My new abs felt amazing. Hard to the touch. I tried not to touch my new cock, now rock hard and pointing straight upwards as if to profane God Himself. I dried off and tried to wrap the towel around my waist, though my cock had other ideas.

"Son, as I said, your cock can take power from other men. But it can also grant it," he said as he put a cooler full of Gatorades next to my bed. "And to grant it, you're going to have to nourish him back to health." As I laid down on the bed, Aiden looked up. He went from being a handsome twunk to being a lithe twink, but still just as hungry for my hammer. "It's going to take a while, but thankfully, there's no school tomorrow."

Aiden's lips, now somehow twice as full as before, impaled themselves on my girthy kielbasa. Aside from the drinks, my dad also brough me a pizza to tuck into. I basically just laid back, getting blown for the next two hours while watching TV. At some point, I fell asleep while Aiden kept blowing me. I woke up the next morning, Aiden still blowing my still rock-hard cock. I guess my demon genetics made it possible to safely keep it up for this long. Aiden was now noticeably more masculine than he was last night. I was still as jacked and hung as last night. Aiden now had a body like a gymnast, unlike the figure from the night before who made Andrew Barth Feldman from No Hard Feelings look like Zac Efron. His regains muscles were only about a sixth the size the were before I siphoned him. His dick and balls looked about less than half their old size and his pubes had grown back.

I had tons of questions to ask my dad, assuming he'd have even half the answers, but for now, it looked like I was going to be nourishing Aiden for the time being.