How to Beef up Your Dragon

It all started as just a simple flight with our classic human and dragon duo. The two of them were excited to get back to flying as just the two of them with no enemies or other distractions, not even really caring about where they're going for that matter.

Sure, Hiccup loved flying with the other riders, especially Astrid, but there was always that nostalgic sense that he would get whenever he got the chance to fly alone with Toothless. Besides, this would also give them a chance to get into some rather intimate actions, as they often do when alone.

The two of them were flying in a random directions, practicing a few tricks along the way, when they come across a small island located wherever the heck they were at that moment, Hiccup figured that would be a great place to stop for a break, so Toothless sets down on the island and Hiccup hops off to have a look around.

The island was pretty classic, a bunch of trees, a river running through it, nothing too odd about the island at first, but that was when Toothless started sniffing something in the bushes nearby. "What did you find, bud?" Toothless steps to the side and reveals what he was smelling.

On a bush in front of him sat some kind of pink fruit that he couldn't identify. "Huh…never seen these before. Wonder if they're any good, then again I also wonder if they're safe to eat." He then looks around and remembers that he's alone. "Heh, it's times like these that Fishlegs would be helpful, he probably has a whole book on exotic fruit."

Toothless gives the fruit another sniff and couldn't help but detect a sweet scent mixed with another scent that even he couldn't quite identity, and he's smelled just about everything from roses to Gronckle dung.

Hiccup pats Toothless on the head. "Might want to stay away from those, bud. Hard to tell if they're safe or not." However, before Hiccup could stop him, Toothless leans his head in and chomps down on three of the fruits in one opening of his mouth. Hiccup puts his hands to his hips. "So much for an all-fish diet. How do you feel?"

Toothless looked like he was in heaven as the sweet taste of the fruit flooded his taste buds and made him give a satisfied smile. Seeing that it wasn't really harming him, Hiccup figures that the fruit was fine, so he picks one off for himself and takes a bite, finding that he liked the taste too. "Oh yeah, these are good!" he finishes it quickly. "Wow, I'll have to find a way to get these back to Berk."

However, Hiccup then hears some kind of groaning next to him, and that groaning seemed to come from the dragon standing next to him. "Uh…Toothless? Are you ok, bud?"

Toothless grips his head with his paws in which Hiccup initially thought was agony, but then he also noticed that Toothless's eyes were rolled up into this head as if he was enjoying this. "Uh…?"

Then, in a flash, Toothless sits on his hind legs and his front paws begin to shift and his claws began to expand and form what looked like fingers, on top of that his arms began to bulge out with muscle. Hiccup stood there in shock. "How the-?" However, before Hiccup could finish his thought, a wave of pleasure ran over his mind as his own arms began to puff up in the same way as Toothless's, going from noodles to muscles in seconds.

The two of them were soon caught up in this sudden muscle growth. Toothless's legs shifted into a more anthro, bipedal form, his chest bulged out into head sized pecs which both sprouted fist sized nipples, his stomach sprouted a 6-pack of rippling muscle, his butt inflated to a smaller size than his pecs but was still huge, and to top it off his balls inflated to around the size of his head.

Hiccup, meanwhile, was experiencing the same level of growth that caused his clothes to rip off of him in seconds, and in even less time he grows by at least a foot in height and becomes even more ripped than Dagur, with contouring muscles that glistened in the sunlight. He also spotted that the front of his pants was bulging out with a package that ripped right through his pants, showing a hard cock that was at least a foot long plus balls that were twice the size of his hand.

After a solid two minutes of this growth, Hiccup and Toothless suddenly stop growing and were left panting, tired from what just happened as they look to each other, waves of shock rushing over the two as they admire each other's beefy bodies.

"Whoa…Toothless…I-You look…incredible!" Hiccup comments and Toothless grunts a similar response.

Hiccup then looks to the plant that the fruit was on and comments, "I guess this fruit is some kind of…growth fruit. Kind of cool, actually. I wonder if-"

Before Hiccup could finish, he nearly fell on his ass as he felt a warm, wet, toothless mouth suddenly surround his now very large cock. Hiccup grabs his dragon's head and starts to pull him away. "Whoa, Toothless! Slow down, buuuuuu…" Hiccup couldn't help but admit that having his large cock surrounded by Toothless's warm mouth felt very good.

Hiccup also noticed that his cock was now twice as sensitive as usual and was now throbbing within the confines of Toothless's mouth, drizzling pre-cum at such a rate that he felt like a faucet. Hiccup was very certain that he was going to cum then and there, but that's when Toothless pulls away and gives him a big smile.

Hiccup smiles right back. "Toothless, your mouth has always felt good, but now that you're like this…it just feels that much better. You mind if I…?" Toothless gestures to his beefed up frame in a 'come and get it' way.

Hiccup didn't know quite where to start. He loves Toothless in his usual, smaller, feral form but this…this was something else all-together. He decided to go straight for Toothless's massive pecs, so he pushes his hands against the chest flesh and was all the more impressed with how firm they felt.

Even with Hiccup's new beefed-up arms, the muscles on Toothless's pecs were hard as a rock and felt quite heavy. The only relatively soft area of those pecs were his engorged nipples, but even they were almost as firm as the muscles that lined Toothless's chest.

Hiccup leans in and tries to suck on those nipples, but find that they're far too wide for his mouth, even with his mouth opened wide as possible, so what he ends up doing is running his mouth along the rim of the giant right nipple, enticing very loud groans from the massive Night Fury.

While he was doing that, Hiccup decides to rub Toothless's just-as-large left nipple with his giant hand, loving how firm the flesh felt in his hand.

While doing that, Hiccup soon felt something wet brush up against his cock tip, making him look to see that his cock was, in fact, sandwiched in between Toothless's massive pecs, which gave Toothless the perfect chance to lick and suck Hiccup's cock.

Hiccup couldn't help but take up this opportunity to rub his cock in between those pecs, loving how the firm flesh squeezed his cock like the world's biggest, firmest ass, and making him spill pre-cum from his engorged balls at a rapid rate.

Due to the sensitivity of his cock, it took no time at all for Hiccup to shoot the biggest load of cum in his life, spraying at least 4 ounces of hot cum with each and every squirt, something that Toothless tried his best to contain in his mouth, but that proved to be all the more futile.

With the biggest and most intense orgasm he'd ever experienced done, Hiccup nearly flops down to the ground if it weren't for something cushioning his fall. Hiccup looks up to Toothless, whose lips were still coated in his cum as he licks said lips, and smiles. "Dam, Toothless, that was intense."

Hiccup shifts a bit and realizes that he had landed on something hard, yet a bit…fleshy at the same time. Hiccup's eyes widen to their sockets as he realizes just what he is lying on. "Toothless…I'm not on a rock am I?" Toothless gives Hiccup a grin as he motions to behind him.

Hiccup turns his head around and spots something that he felt was surely impossible. What he was lying on was a pink rod, well more like a tree stump, of flesh that extended at least half a foot past his head and he was currently lying flat on the cock.

Trailing the massive flesh rod, his gaze meets it at the base where it was connected to its owner. Hiccup looks up to said cock owner and comments, "Whoa, bud. Uh…look, I've been able to take your normal sized self close to your knot but this…I don't even know where to start with this."

Toothless understood Hiccup's dilemma and didn't want to do anything to hurt him, despite how horny he might be. Still, this is an erection that was certainly not going to go away easily, so he knew he needed to figure out something.

It was then that, with his extra sensitive ears, Toothless hears something approach from nearby. He looks to the left, making Hiccup look to the left, and the two of them spot Stormfly flying in with no one on her back. "Stormfly? Uh, hey girl, where's Astrid?" Hiccup then remembers that Astrid had to leave Berk for a family trip and was not allowed to bring Stormfly.

Stormfly then looks and sees just what was going on and her jaw nearly hits the floor. She saw a beefed up Hiccup who was mostly naked on top of a cock that was bigger than him which seemed to belong to an even beefier Toothless. Dozens of questions flooded her mind in that moment and Hiccup could see just why. "Ok, Stormfly, we can explain."

Stormfly then looks to Toothless and asks him something in dragonese, to which Toothless replies in his words. After a bit of talking, Stormfly jerks her head back, not so much out of shock or disgust but more out of curiosity. She walks around the two beefcakes and spots the bush with the growth fruit still on them.

Stormfly then leans in and plucks three of the fruit off the bush with her mouth and chomps them down in one gulp. Knowing what happened when Toothless did the same thing, Hiccup knew that this was going to be interesting.

In moments, Stormfly began looking as much in Valhalla as Toothless did when he ate the fruit as her wings began to shift further into her back while her wingpits began to sprout a set of arms that each got inflated with muscle by the second.

Her chest began sprouting a set of four breasts that inflated to about ¾ the size of her head with hand sized nipples to go with them, her stomach sprouted a set of abs, and the most shocking thing of it all was her groin began to sprout a set of blue balls that inflated to around the same size of Toothless's which were backed up by a barbed cock that extended past her head.

Once all that was complete, Stormfly lets out a loud roar, keeping her arms and wings high in the air, as the growth just felt that good. The two beefcake boys, on the other hand, sat there in total shock as the Nadder not only developed a muscular anthro form, but also a set of male genitals.

Hiccup rubs his head. "Huh, kind of interesting that Stormfly grew a penis where Toothless and I are still full males." He then looks Toothless in the eyes and Toothless seemed to have a look of embarrassment. Hiccup tries for a moment to figure out what the Night Fury was thinking, but then the context of the situation made him realize what Toothless was worried about.

Without any additional words, Hiccup gets off of Toothless's cock and walks over to behind him where Hiccup spots something even more shocking. Nestled between Toothless's puffed up anus and boulder sized balls seemed to be two black lips that seemed to be leaking fluids all over the ground below.

Hiccup gasps in total shock. "You…you're a herm too." Hiccup then feels around his own large ass and finds that he too has a set of folds that weren't there either. "And so am I…how in the world…" he looks back to the fruit that sat on the bush. "Whatever those fruit are sure are strange. Makes you wonder-" before Hiccup could finish his thought, However, he felt the ground shake a bit as Toothless gets up and makes his way over to Stormfly.

The two of them start by embracing each other's massive bodies, letting their pecs/breasts and cocks rub together as they give each other sensual kisses.

Hiccup crossed his arms in amusement. "Huh, guess this means you aren't completely gay, bud."

Toothless was too caught up in the intimacy of kissing Stormfly and playing with her breasts to respond to Hiccup's comment. After a moment, however, Stormfly suddenly turns around and gets on her hands and knees, lifting up her spiked tail high in the air and presenting her rear for Toothless, her large pussy lips drizzling fluid onto her large, blue balls which were now resting on the ground.

Licking his lips, Toothless picks up his giant cock, something that was only possible with his huge muscles, as he found out, and lines it up with Stormfly's cunt before pushing it in, instantly getting caught up in the warm tightness of the Nadder's cunt.

Stormfly digs her claws into the ground as Toothless begins to push his cock further and further into her pussy, hearing loud, pleasured groans from the Night Fury. Stormfly's cock was now drizzling pre-cum onto the ground, a certainly new feeling that was currently flooding her mind with thoughts of lust, so much so that couldn't help but slip the tip of her cock into her waiting mouth, loving the taste of her own pre.

While the two dragons were currently having sex, Hiccup was just standing by as he realized his cock had regained full mast and was throbbing like crazy. He knew he needed to put it into something.

From where Hiccup was standing, he got full view of Toothless's ass, pussy and back-sack as he thrusts into Stormfly, making his giant, black balls swing like pendulums, and Hiccup couldn't help but notice how wet and waiting Toothless's cunt was at that moment. Hiccup also figured that a cunt is a cunt, so he walks over and positions his cock to Toothless's cunt before pushing it in, feeling overwhelmed by the hot tightness of the wet lips.

Toothless couldn't help but love the feeling of having his pussy being fucked, so he keeps his tail raised high in the air and leans onto Stormfly's back before wrapping his arms around her sides, gripping her breasts which were starting to lactate like crazy, and started fucking Stormfly's cunt like he had never fucked before.

With each thrust from the Night Fury, Stormfly's barbed cock managed to get further and further down her throat, drizzling pre that went straight into her stomach as she lets out muffed moans to Toothless fucking her.

Toothless, who was all too caught up on the sensations of fucking Stormfly to care about anything else in the world, kept his pussy clenched tight for Hiccup's cock as he pounds his pussy good and hard, making his large balls slam against Toothless's with each thrust.

Hiccup kept his beefy arms wrapped around the base of Toothless's tail as he kept on fucking and fucking and fucking, feeling his cock throb even more to each thrust.

Pretty soon, Toothless's knot had emerged from its sheath, revealing a knot that was at least half the size of a Terrible Terror, and after a few more thrusts, Toothless pushes his knot inside Stormfly's cunt and starts to unload his massive, black balls into her cunt, which triggered Stormfly's first male orgasm as her cock shoots cum down her gullet.

All that cum ends up filling up her womb and stomach to the point where she looked to be heavily pregnant. Hiccup cums right after Toothless, filling up Toothless's cunt with his own load of hot cum that bulged out Toothless's stomach as well.

Once all 3 were fully settled from their orgasms, Hiccup pulls out of Toothless but Toothless's fat knot was still lodged inside of Stormfly, so they knew they were going to be there for a while. Stormfly was fine with this as she lets her cock slip out of her mouth and flop down onto the ground, making an audible thud.

Hiccup lies down on the ground, which was now being puddled by the cum that was coming out of Toothless's cunt, and Toothless and Stormfly lie on their sides right next to Hiccup, embracing each other's beefy forms with all the intimacy in the world.

Hiccup reaches his arm around Toothless's chest best as he can as he says, "Man, that was intense. I don't know how long these effects are going to last, but I know that I can enjoy this for a bit." With that being said, the three of them settle in for a quick post-sex nap, one that was certainly well deserved and needed.

(4 months later)

Astrid stood in Hiccup's house with her arms crossed tight as she looks to Hiccup with a devilish glare and asks. "So…care to explain what you guys did while I was gone?"

Hiccup looks over to the still-beefed up Toothless and Stormfly, both of which were now pregnant from that mating session they had months before. Hiccup then rubs the back of his head. "Yeah…you're gonna want to sit down."