E-Gains Institute
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spindlyjohnny.bsky.social
E-Gains Institute
@spindlyjohnny.bsky.social
710 followers 380 following 460 posts
Writer, morpher, and fan of muscle growth! DMs are always open, so come say hi if you want! 🔞

Put anonymous questions or suggestions here: https://forms.gle/LStZMFbMg7KbQbdY9

Donate to me: ko-fi.com/spindlyjohnny
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spindlyjohnny.bsky.social
Since they hired him, the company hadn't had any issues in the warehouse. He's tall enough to organize the high shelves, strong enough to bring in shipments by himself. Only problem is how ornery he is. At least three people call out per week from a sudden inability to walk...

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You finally made it to the warehouse. The building's underground was a maze of empty white walls and fluorescent lights, and it took ages to find it. The entire first week of this new job had been boring flunky work, but walking those dust-choked hallways was a special kind of torture. At least you could finally get that printer paper. The heat of the warehouse was the first thing that hit you when you pushed open the door to the warehouse. It was sweltering in there. You could hear a fan whirring uselessly in the corner, a stale, woody scent as the weak breeze pushed past you. The place wasn't as wide as you expected. Instead it was incredibly tall, with imposing floor to ceiling shelves looming overhead. You had already started digging around the lower shelves when you heard the door opening behind you. "Who're you, and what're you doin' here?" The voice came from feet above you, rumbling through the cramped warehouse with an intimidating grit. You could smell a testosterone-filled musk radiate into the room, the heat rising even further, the humidity rising. You turned around to see a hulk of a man, maybe dozen feet tall, squeezing himself through the normal-person sized door. His biceps rubbed against his sweat-slicked chest, his shoulders and back wide enough to block all light from the outside hallway. He looked down at you to read your name tag. "New guy, huh? Welcome to the company. Sorry I've got my shirt off, but it's damn hot in here. Not that it looks like you mind." He seemed bemused at your awe. He pressed his arms together, squeezing his pectorals overhead, bulging so far they almost covered your view of his face. The titan moved in, his torso-wide forearm pinning you against a shelf. You could only stare at the brick wall of his abs, his body thrice as wide as yours. That, and a massive bulge beginning to tent his damp sweatpants. He chuckled. "I think we're gonna get along real well, new guy. Real well..."
July 22, 2025 at 11:59 PM
spindlyjohnny.bsky.social
Day 25:

"Well, it's the day of the competition. As expected, I'm nowhere near fittin' through those tiny doors! My bicep alone is too wide. But I don't care about that trophy anymore. All I can think about is getting even more massive! I'm gonna keep fuckin' growing 'til this armband gives out!"
July 2, 2025 at 1:03 AM
spindlyjohnny.bsky.social
Sorry for being very dead here lately! I just was going through some stuff, but things are going a bit better now. I’ll get out the last part of the growth sequence soon, and then get back to regular posts
June 29, 2025 at 10:27 PM
spindlyjohnny.bsky.social
Day 14:

“Woke up another two feet taller than yesterday… at this point, fitting in the building’s a pipe dream. But if nothing I can do will stop the growth, then I’ll just have to commit to it. Maybe once I get huge enough I’ll finally break this damn armband. Time to get extra massive!”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 17
Day 12:

“I’ve been trying to lean down a bit, get a bit more shredded. Gotta be stage ready, y’know? But even now that I’m eating less and doing more cardio, I’m still growing… getting taller and bulkier every day no matter what I do. What am I gonna do if I can’t fit in the building…?”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 12
Day 8:

"Posing practice today, so I thought I'd share a progress update. Impressive, I know! I'd only grown a few inches a few days ago, but now I'm towering over all the little guys I work out with. Guess it's exponential... Think I'm big enough for the stage yet?"
June 20, 2025 at 1:41 AM
spindlyjohnny.bsky.social
Day 12:

“I’ve been trying to lean down a bit, get a bit more shredded. Gotta be stage ready, y’know? But even now that I’m eating less and doing more cardio, I’m still growing… getting taller and bulkier every day no matter what I do. What am I gonna do if I can’t fit in the building…?”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 12
Day 8:

"Posing practice today, so I thought I'd share a progress update. Impressive, I know! I'd only grown a few inches a few days ago, but now I'm towering over all the little guys I work out with. Guess it's exponential... Think I'm big enough for the stage yet?"
June 17, 2025 at 2:54 AM
spindlyjohnny.bsky.social
Day 8:

"Posing practice today, so I thought I'd share a progress update. Impressive, I know! I'd only grown a few inches a few days ago, but now I'm towering over all the little guys I work out with. Guess it's exponential... Think I'm big enough for the stage yet?"
June 12, 2025 at 10:50 PM
spindlyjohnny.bsky.social
Unrelated to the growth drive, I've just finished this writing commission for @buffdrifter.bsky.social! Tim and Benjamin stumble upon an interesting device walking home together... muscle growth, age progression, and other hyper body changes ensue. Read below:

drive.google.com/file/d/1RBlb...
Commission for @buffdrifter.pdf
drive.google.com
June 11, 2025 at 2:02 AM
spindlyjohnny.bsky.social
Day 4:

“The last few days have been incredible! My strength’s going through the roof, and I’ve practically doubled all my lifts. Only issue is that I smashed my old phone grippin it too hard! My hands have gotten so big that I needed a new one anyways. Hopefully this next one’s more durable…”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 6
Day 1:

“Just got back from the gym, folks. It’s only been a day, but the armband’s been gettin real tight. I feel real heavy too. Friend said it was normal, but I’m worried I won’t be able to get it off. My shirt’s feelin pretty tight too though… guess the band gives you a crazy pump or somethin!”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 4
Day 0:

"Hey everyone! Name's Liam. I'm an amateur bodybuilder, looking to get my pro card soon. My friend at the E-Gains Institute gave me this fancy armband and told me to interact with his audience for a while. Not sure how much of an edge this'll give me, but it can't hurt to try!"
June 8, 2025 at 11:00 PM
spindlyjohnny.bsky.social
Day 1:

“Just got back from the gym, folks. It’s only been a day, but the armband’s been gettin real tight. I feel real heavy too. Friend said it was normal, but I’m worried I won’t be able to get it off. My shirt’s feelin pretty tight too though… guess the band gives you a crazy pump or somethin!”
spindlyjohnny.bsky.social E-Gains Institute @spindlyjohnny.bsky.social · Jun 4
Day 0:

"Hey everyone! Name's Liam. I'm an amateur bodybuilder, looking to get my pro card soon. My friend at the E-Gains Institute gave me this fancy armband and told me to interact with his audience for a while. Not sure how much of an edge this'll give me, but it can't hurt to try!"
Growth Drive Info: 1 like: Increase mass by 0.5% 1 repost : Increase mass by 2% Tip on Kofi: Increase mass by 5% per $1 Starting Height: 6'2" Staring Weight: 220 lbs
June 6, 2025 at 2:17 AM
spindlyjohnny.bsky.social
Day 0:

"Hey everyone! Name's Liam. I'm an amateur bodybuilder, looking to get my pro card soon. My friend at the E-Gains Institute gave me this fancy armband and told me to interact with his audience for a while. Not sure how much of an edge this'll give me, but it can't hurt to try!"
Growth Drive Info: 1 like: Increase mass by 0.5% 1 repost : Increase mass by 2% Tip on Kofi: Increase mass by 5% per $1 Starting Height: 6'2" Staring Weight: 220 lbs
June 4, 2025 at 8:56 PM
spindlyjohnny.bsky.social
Don't you hate it when your uber-muscular dad keeps showing off in front of your friends? Can hardly even invite them over, since half the time he's pounding away at some sex toy right in the middle of the living room. Just gotta hope this third puberty is his last...

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Your friend Todd had always been cagey about his home life. He never hosted hangouts, all of his pictures were conspicuously taken outside, and any questions were expertly talked around. All you knew was he lived with his parents. But his birthday was today, and with it came a good excuse to visit unannounced; delivering a surprise present. Standing on his porch with gift in hand, you wondered what could possibly be inside that he was so secretive about. Nothing to do but knock. The response was quick. You heard the porch creak beneath you as the earth shook. Booming steps resonated through the closed door, and soon after it swung open, revealing a veritable titan of a man. He was taller than the doorframe and three times as wide, mountainous arms pushed far off his sides by overgrown lats. His tungsten-dense quads shoved past his tiny shorts. You only barely came up to his chest, his tight abs filling your view. "Ah, you must be one of Todd's friends! Been a long time since he had someone over! I'm his dad, Clint. Nice to meet you, kid." He leaned down and grabbed your hand, shaking it in a crushing grip. His forearm flexed and rippled as he did, pumping itself bigger around than your waist as he almost tore your hand from its socket. He pulled you into the living room, which reeked of sweat and sex. Dumbbells, empty tubs of protein powder, and broken fleshlights littered the floor, dirty clothes draped over the couch. Clint quickly cleared a space for you to sit, giving you a sheepish look. "Sorry, would've cleaned up a bit if he told me you were coming. Always hard to keep the place clean during a growth spurt. You know how it is." Clint made an angry face and flexed, growling to drive the point home. He couldn't hold it for long though, breaking into a goofy smile as you watched him. He called down the hall. "Todd! Company's here! Don't make me entertain him alone!" He turned back towards you, puppy-like excitement in his eyes. "Wanna see some more?"
May 28, 2025 at 7:00 PM
Reposted by E-Gains Institute
michverdun.bsky.social
Looks like he can't hear you. Wonder what he's listening to? michverdun.tumblr.com/post/7842899...
A picture of a bodybuilder wearing a baseball cap and headphones taking a selfie in a mirror. His muscles have been morphed to be incredibly large.
May 24, 2025 at 1:14 AM
spindlyjohnny.bsky.social
Your new muscle growth serum was meant to help the little guy, but that was a silly idea. It's the musclebound freaks of the world who deserve it, not the wimps. And while you're wasting away producing more formula, the real men are growing more titanic with every swig...

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After years of work, toil, and rat trials, you finally developed your perfect muscle growth serum. Near instant onset of high-quality muscle mass development with no side-effects! Over the last week night you synthesized about a liter's worth, as pure as you could get it. You'd show the assholes who ran your local gym what real strength looked like soon enough. The look of shock and awe on their faces would be priceless. You got there early in the morning, just after opening, and started making your way to the locker room... "Heh, what's this shit, little man?" Dammit. You felt a meaty hand wrap around your shoulder. It was the king of the brutes, Wes. He was built like a silverback, his arms and chest monumentally thick, and you could feel the power of those muscles crushing your collarbone as he held you in place. He wrapped his massive, sweat-soaked body around you and plucked the canister from your hands. Does he ever stop working out? "Aw, you made me some pre-workout? Guess you're learning your place, runt." "Hey, wait -" But his lips were already on the mouth of the canister. You watched with horror as Wes started chugging the serum, his neck bulging with each swallow. He visibly expanded with each gulp; his shorts rode up his chiseled quads, his lats stretching his wet compression shirt even tighter across his physique. He had been bulky before, but now the fat was spread so thin he looked competition ready. His veins throbbed as more of the serum was pushed throughout his body, adding kilos of slick mass to the already overgrown beast. He brought the bottle down and let out a massive burp, echoing through the empty gym. He looked down at his new body in awe, the same awe that you thought he would have for you. "Fuck, I'm a monster! An unstoppable tank! And it's all thanks to you, runt." He flexed his new musculature, struggling to articulate his joints around all the new mass; he didn't seem to mind. "Now it's time to finish the other half..."
May 19, 2025 at 6:08 AM
spindlyjohnny.bsky.social
In other news, I've officially graduated university! Which is rad!

But also my roommates stole some of my stuff as they were moving out. Which is less rad!

In short, I have the time and need to take on more commissions, so if you like my work, hit me up! Maybe I'll set up a Kofi again too...
May 19, 2025 at 5:03 AM
spindlyjohnny.bsky.social
I guess it was sort of on a whim? I wanted to get better at making art, and I really needed a sexual outlet, so it happened pretty naturally. Plus I thought it'd be a nice side-hustle. That last part didn't really work out, but the self-improvement aspect has been fulfilling, and it's pretty fun!
May 19, 2025 at 4:58 AM
spindlyjohnny.bsky.social
You ever lived with a 6'7 mountain of muscle with a neverending libido? Gets tiring. It's hot the first few times he shoots a gallon of cum across the bed, but eventually it just makes laundry overly difficult. At least he's having fun gooning over himself.

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#musclemorph
"Hey bro! Sorry about the mess! I'm... a little busy." You walked into your apartment to see your roommate Will jacking off. This was not a surprise, frankly; you could hardly think of a time you had lived with him where his dick wasn't out. At present he was humping into a fleshlight, a puddle of precum flowing out of it onto the floor. Wet slapping rang across the room. He looked pumped, and the entire room reeked of sweat and musk; he must have come straight home from the gym. You waved to him as you walked to the kitchen. "It's fine. Just make sure you clean up." "For sure! I've been edgin for like... three, four hours now... shouldn't last much longer...!" He tensed up as he finished the sentence, gritting his teeth and plunging deep into the fleshlight. A plastic cracking sound rang out from inside; you were surprised it withstood his punishment this long. Will let out a deep breath, his whole body quivering with pleasure. You pulled out the bread and started making a sandwich for lunch. "Ah fuck, ah shit! I love my dick so much, bro. I just wanna stroke my slick, meaty goonrod all day..." "You already do, Will." If he heard you, he didn't seem to care. His strokes turned into full on slams as he let himself go. His legs and glutes flexed wildly as he pistoned in and out of the toy. Will's eyes rolled into the back of his head as his tongue lolled out of his mouth, drool dripping onto his jiggling pecs. He couldn't help but bring his bicep into a flex, admiring his own body as he fucked. "I'm gonna cum dude! I'm gonna shoot my nutgunk deep into this plastic pussy! I'm gonna knock this shit up bro!" And with one final thrust, the dams opened. A torrent of sperm-packed jizz pushed out of the opposite end of the toy, coating both the floor and the coffee table. After a few minutes, Will pulled the toy off with a slick popping sound. He panted quietly as he tracked you to your position in the kitchen. "...Could you make me a sandwich too?" "I guess."
May 8, 2025 at 7:07 PM
spindlyjohnny.bsky.social
Gabe finally made it to the last house of the day, well into the afternoon. Wasn't his fault it took so long though: all that mass can really get in the way sometimes! He's got more beef than a Belgian Blue; how could he not stop to feel his incredible body up every so often?

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Gabe strutted out of the house bright and early, snow shovel in hand. It had snowed again last night, leaving another inch across the block. Through his boots he could feel the slippery layer of ice underneath. Time to get to work. He started with his own driveway, digging through the cold white slush and cracking the ice. Ever since he was a teenager, Gabe shoveled snow for some extra cash; he needed it even more now, given the cost of maintaining his mass (plus, it was a pretty good workout). Nowadays the entire street relied on him for the service. By the time he finished his own driveway, he had gotten pumped, his dense musculature warming up rapidly from the exertion. He stripped off his jacket to prevent himself from overheating before heading over to the next house. As he shoveled, he thought about how much easier this was before. Sure, he was stronger now, and had far more endurance: he bet he could do the entire street twice before even breaking a sweat. But getting his muscles around each other had become an issue in the past few years. His bicep rubbed hard against the underside of his pec with every scoop, his shoulders and traps pushed tightly together whenever he tossed the snow away. The snowflakes that hit his skin instantly melted, rivulets of water glistening on him as he worked... He couldn't help but take a short break. To put a hand to his own pumped arms, to feel how much bigger he had grown since last winter. He turned his head and licked one of the droplets of water off his shoulder, shivering as his tongue met the cold air and the heat of his body. Thankfully he was wearing his sweatpants, or he'd be giving much more of a show to the neighbors. His hands wandered to his nipples, grabbing and squeezing them, fully lost in the pleasure of his own body... Alice looked through the blinds and sighed; Gabe was messing around out there again. Her driveway wasn't getting done for another hour at least. Why does she even pay that big lug...?
April 26, 2025 at 9:11 PM
spindlyjohnny.bsky.social
Despite how huge he was getting, it was hard not to see him as cute when he was still so much shorter. Having him staring up at you, silently begging for you to point out how massive he was getting... It almost didn't bother you how often he had dragged you to the gym with him.

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Ivan had always been a little guy. He'd stayed around 5'2" since high school, which was when you first met him. He was teased about it relentlessly back then, and you knew he had a bit of a complex. But ever since you both joined the workforce he hadn't had many problems about it, besides failing to reach high shelves. He was a chill guy for the most part. At least, until you both started hitting the gym. Turns out, he was much better at getting wide than tall. After the very first workout he put on entire pounds of muscle, and the 'beginner gains' didn't stop coming. Abs quickly pushed through his old skinny-fat physique, more definition and striations cutting across his body by the day. And all of that mass had to be compacted onto his tiny frame. Ivan outgrew his wardrobe in less than a week. It was incredible watching him work; it was like just touching the weights made him bigger and stronger. He was benching 400 by the end of his first month. The workouts became more of a spectacle than a collaboration. He was in the gym every day, sometimes twice a day, somehow never tired, and he'd drag you along to watch. Ever since he got a taste of being the big guy, he'd become obsessed. Ivan loved to compare himself to you, show you how his biceps were twice the size of yours, how his forearms were as big as your quads. He'd curl you for reps without breaking a sweat, ask you to tell him how big he was getting. And every time you said "Yeah, you're looking huge" or "You're a beast, Ivan", he'd practically melt with joy and excitement (enough that you could see it in his gym shorts). You wondered if he found some other guy to outsize when he went along, or if the now daily ritual was just between you two. In any case, Ivan was only just getting started. Every day you'd see him strip out of his sweat-soaked gym clothes, and every day he looked even more monstrous than before. Sooner or later he'd be wider than he was tall, and Ivan definitely didn't seem to mind.
April 17, 2025 at 9:57 PM
spindlyjohnny.bsky.social
Why thank you! I'd usually rather be an observer/inciter of transformation stuff, but I can dig a little bit of it for myself. Hell, I think something in this message is doing something to me... Was my shirt always this tight? It's an XXL... didn't realize my biceps would stretch the sleeves...
April 9, 2025 at 1:57 AM
spindlyjohnny.bsky.social
I suck at naming things, but thinking of transformations is fun. Assuming the goal of the game is to get as huge as possible, then shrinking/size theft transformations would work. Musk and body hair for sure. Maybe some other stuff like growing horns, wings, or tusks? And personality changes too!
April 9, 2025 at 1:51 AM
spindlyjohnny.bsky.social
They're sort of opposites of a spectrum, right? With daddification, he's probably going to be the one taking charge, where with a himbo you're gonna be the one taking care of him. So which one I prefer sorta depends on how much control I want! I like older men though, so daddification is my pick.
April 4, 2025 at 11:53 PM
spindlyjohnny.bsky.social
I’m kinda short on ideas at present, so I made a little anonymous suggestions/questions form. I’ll be using it whenever I need some inspiration, so go ahead and fill it out with whatever you want
April 4, 2025 at 2:49 AM
spindlyjohnny.bsky.social
The exercise science department developed a new compound for muscle growth a while ago, but after testing it was deemed unsafe for humans. It's supposedly under lock and key now, but the university's athletes seem bigger than before...

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#musclegrowth #gainer #musclemorph
It was almost time for another check-in, and Jerome was nervous. He came to the university on a swimming scholarship, but the head coach thought he had more potential for something else. What that was, he wasn't told. All he knew was that he'd get a full-ride if he followed Coach's orders, and that was enough for him to sign on. But now that a few months had passed, he was having second thoughts. He had put on nearly 200 pounds of muscle and fat, and Coach still seemed unimpressed at weigh in. His pecs, once flat and firm, were massive domed slabs of meat now, soft to the touch. They rested on his hard-as-brick tortoiseshell abgut. His arms fought against his lats and chest, biceps permanently digging into his side even unflexed. His shoulders had gotten so broad he couldn't fit through doorways; even if they hadn't, his legs were just as wide. The problems didn't stop there. Whatever was in the preworkout Coach gave him, it made him hungry. Animal-style ravenous. He was eating 8 meals a day of whatever he could get his hands on. His stomach was still rumbling, even after raiding the local Wendy's out of stock, somehow both starving and bloated. His libido was amped too; his dick was permanently hard, and his balls swelled up to the size of grapefruits. Whenever his muscles inevitably rubbed up against each other, the jolt of sensitivity caused him to leak and moan. He had gotten banned from a few classes from it. Even moving around was starting to become a problem for him. He couldn't bend his arms enough to pull down a shirt anymore, forearms and bicep clashing midway, and it stayed rolled up on his pec shelf. But he knew it wasn't going to be enough. He would go in there, and his weigh-in would be over 400 pounds now, and Coach would feel up every inch of his body until he came all over the floor through his jockstrap. And then Coach would say he was too small, needed to eat at least one more meal every day, lift for another 30 minutes. And Jerome would.
April 3, 2025 at 9:24 PM
spindlyjohnny.bsky.social
I can write pages of muscle growth smut in a few hours, but when it comes to my research paper all that energy disappears somehow… the world is cruel
April 1, 2025 at 7:19 PM
spindlyjohnny.bsky.social
About to play Call of Cthulu for the first time today! Wish me luck
March 30, 2025 at 4:55 PM