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A favorite feature of Pfatter U’s fitness center is our sauna, a favorite spot for our students to simply relax and let go. Installed by a world-renowned, obese Finnish designer, the steam room has special properties that activates adipose tissue, resulting in a calming experience and a much softer physique for all who enter.
Kieran had been suffering from an aching back ever since the hockey season ended. When his trainer recommended the sauna for some relief, he jumped at the opportunity. “You’ll need this,” the trainer said, handing him an extra-large towel, winking.
Kieran didn’t think twice - all he was focused on was ridding himself of this back ache! He gingerly stepped in and cranked up the steam. As his pain dissipated, he leaned back, fully relaxed. When he picked his head up, he noticed some bloating in his midsection; suddenly, his belly lurched forward, rounding out and filling his entire lap. His pecs became soft with fat as his nipples inverted, his toned arms losing all definition as they expanded.
His elation from the absence of back pain overrode the fear at his sudden transformation. Kieran jiggled his new belly happily - at least his back would be able to support this new weight, pain-free!
Join our Faculty Tier to watch what happens when Byron, Francis, and Elliot step into Pfatter U’s super-sizing sauna!



#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Since some of our Pfatter Pfans asked …
“I love that my residents know they can come chill out in my room if they’re feeling stressed. When Otis comes by, I always make sure to have some special chocolates on hand. They really help soften things up when life seems hard.” - Dario ‘25
“Whenever I have a bad day or I’m stressing over a class, I know I can head to my RA Dario’s room and play some FIFA. I can relax on his comfy sofa while he feeds me these delicious chocolates he always keeps on hand. Dario really cares for all his residents, he’s like our big brother. We’re so lucky to have someone like him making our on-campus experience so much more filling … I mean, fulfilling!” - Otis ‘27
Our Admissions Department has come up with some new promotional materials featuring student testimonials. They’ll really inspire you to enroll!
Join our Senior Class tier to see all five videos!
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“Whenever I have a bad day or I’m stressing over a class, I know I can head to my RA Dario’s room and play some FIFA. I can relax on his comfy sofa while he feeds me these delicious chocolates he always keeps on hand. Dario really cares for all his residents, he’s like our big brother. We’re so lucky to have someone like him making our on-campus experience so much more filling … I mean, fulfilling!” - Otis ‘27
Our Admissions Department has come up with some new promotional materials featuring student testimonials. They’ll really inspire you to enroll!
Join our Senior Class tier to see all five videos!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Simon never really paid close attention in his biology course - it was pretty dull, but all the athletes took it to satisfy their science requirement at Pfatter U. The class was supposed to be so easy, yet somehow he was almost failing, as were a lot of his classmates. When their professor, Dr. Pande, announced an opportunity for extra credit, Simon and the other student athletes eagerly volunteered.
It turned out all they needed to do to raise their grade was volunteer to help their professor calibrate his new prototype, the Thickening Machine.
To read Simon’s full story, and watch his five classmates succumb to Dr. Pande’s prototype, by joining our Senior Class tier!
#college weight gain#guys gaining weight#ai fat men#ai fat#gaining weight on purpose#male gaining#pfatteruniversity
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Our dining hall’s pastry chef was recently gifted a new recipe, one that had been discovered deep in the archives of our library by Graham, one of our student interns. After a few tries, the chef was successful, producing a buttery, flaky pastry with the consistency of a dense croissant, draped in a coating of sweet and delicate icing. One rare herb, sourced from a forest just a few miles up the road, imparted an indescrible, irresistible flavor to the dessert. Our chef named these new pastries “Pfatt Rolls.”
Sophomore Austin, on his way back from band practice, couldn’t resist the smell wafting from the dining hall as he passed by…
Read Austin’s entire story - and watch these three other students succumb to the sweet call of our newest campus treat - by joining the Senior Class tier.

#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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With March coming to a close, Spring sports are just around the corner! To give themselves a competitive edge, our athletes are starting to bulk up - some of them instantaneously! Ricky’s physique is transforming from a relay runner’s to a shot-putter’s right before our very eyes! 👀 🍑
Join our Senior Class tier to watch more transformations from members of our tennis, lacrosse, and baseball teams - we can already tell this is going to be a BIG season at Pfatter U!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Whoa! Pfatter University is just now recovering from a week-long cyberattack. Every device on campus was somehow infected by something called the Consu.m3 virus, causing all cell phones, computer monitors, and TV’s to display a hypnotic pattern 24/7. Anyone unlucky (or lucky?) enough to get caught staring into it succumbed to an insatiable appetite, consuming any nearby food as quickly as possible. If they ran out, they rabidly ordered and consumed mountain of takeout, mindlessly tossing their trash out the window. The traffic jam of UberEats and GrubHub delivery drivers has only just cleared up, and our groundskeepers are working overtime to clear all the styrofoam containers and candy wrappers off the quad.
Carlos, a computer science major, was the one who finally cracked the code, ridding our network of Consu.m3. He did let his greed get the best of him, though, and one late night in the lab found out how powerful the virus really could be …

Watch Carlos fall victim to the super-charged Consu.m3 virus by joining our Senior Class tier on Patreon!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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When Gus and booked a Spring Break trip for him and his three roommates, he thought they’d get a break from all the sudden fattening events that seem so common at Pfatter University. He himself had gained forty pounds in just one semester from one miscalculation in his Nutrition class.
On their first day of their trip, the ninety-degree weather meant they were destined to spend the day at the resort’s luxurious pool. None of them could have ever guessed that after only five minutes, they’d all grow too big for their seats on their return flight home!
Gus, much heavier than he’d like to be, thought maybe he’d wear a shirt to the pool to cover up his softened physique. He was a little self-conscious around his fit roommates. Ravi teased him for covering up, pinching his developing love handle. Gus tried to ignore it and jumped in with a dramatic plop, his wet floral shirt clinging to his body as he half emerged from the water. It felt heavy against his skin … and then suddenly, much tighter. He looked down and saw the fabric ride up under his chest as his belly grew to enormous proportions, blubber inflating in all directions, coming to rest on the surface of the pool. His already fatter chest swelled up to C-cups, supported by his shirt like a bra.
He turned beet red with embarrassment, three times the size he once was. He looked around to see if anyone had seen him. The other guests pointed and gasped, but not just at him, at his roommates, too, Gus noticed - all much chunkier than they had been a minute ago.
Join our Senior Class tier to see Gus’s roommates Angel, Jesse, and Ravi as they really let go by the pool as their waistlines expand - there must be something in the water! 😉🐷



#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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So many of our Pfatter U students fled our chilly New England campus for warmer, tropical climates this spring break. Most of them opted for all-inclusive resort packages - something tells us they’ll be coming back a little heavier than when they left. Max here posted he’s gained 10 lbs in just two days - he just can’t resist the all-you-can-eat pizza buffet 😉🐷
Join our Freshman Class tier for the full gallery of pics they’re posting on social media from their first weekend away. Join our Senior Class tier as videos are released all throughout this Spring Break week!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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While re-shelving some books in the Pfatter U library, intern Graham found himself in a secluded archive full of dusty volumes. It seemed that no student or professor had been here in a while. A yellowed book caught his eye. He cracked open the cover and began to read, eyes widening as he discovered…
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Pfatter U is proud to announce a new university donor and sponsor - GroBig protein powder! In exchange for some promotional footage featuring our students, the company has pledged to double our dining hall’s budget for the next five years. Sounds like a pretty sweet deal for everyone involved!
Pfatter basketball star Travis jumped at the opportunity to star in one of their commercials. He’s been trying to grow his brand as he prepares for the NBA after graduation. Knowing Travis really wants to make it big, they let him try their newest product - GluteGro!
Watch the minute-long video featured four different GroBig clips (including five extra seconds of Travis’s glutes we couldn’t show on social media 😉🐷) by joining the Senior Class tier!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Last week, Phi Alpha Tau threw a rager of a Fat Tuesday party at their off-campus frathouse. Guests enjoyed catering from the ten top fast food restaurants in the area while they danced and drank the night away. With so many people crammed into one house, and unseasonably warm temperatures outside, it wasn’t long before guys started ripping off their clothes to cool off, and show off - like Cameron here, entertaining his much skinnier brothers by proudly showing off his heft in the photo booth!
Join our Senior Class tier to watch a one-minute supercut with eight different scenes from this out-of-control Mardi Gras bash! Don’t miss the eating, the jiggling, and even the romance, featuring frat brothers of all sizes 😉🐷
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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When study-abroad student Archie arrived from the UK, he had one goal in mind for his time at Pfatter U: achieving the perfect balance of big muscles and soft fat that all his favorite gainers posted on social media.
As he changed in the fitness center before his first workout, he noticed someone had left a tub of protein powder there in the locker room. Without reading the label, he quickly mixed two scoops of GroBig into his preworkout shake. His biceps routine was the most intense he’d ever felt, with power and pure growth potential flowing in his veins.
Back at his dorm, he paused to admire his physique, and saw that his dream was coming true sooner than he could have imagined. Watch his muscles bulge as the GroBig starts to kick in, with a hundred pounds of pure fat to follow. Archie smiled, flexing his big arm, already looking forward to tomorrow’s workout …
Want a video like Archie’s? Join our Faculty Tier to get full access to our gallery of photos and videos, as well as one personalized commission a month!
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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The plumbing at Pfatter University could really use some updating. Every once in a while, our water supply gets contaminated by whatever our chemistry department is working on; this time, their fattening serum prototype seeped into the system and made it all the way to the bathrooms in our dorms. Looks like our students are about to have a swell(ing) morning wake-up in the showers!
This morning, Harrison was feeling stressed out by his upcoming history exam, and knew a nice, long shower would help him to unwind.
Join our Senior Class to read his full story, see his uncensored video, and watch Dylan, Peter, and Jimmy’s transformations, too!



#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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An important reminder that there is a zero-tolerance policy for hazing at Pfatter University. Take this cautionary tale from Phi Alpha Tau five years ago:
Freshman Isaac, hoping to join our most prestigious frat, was force-fed a dozen delicious, calorie-dense cream puffs by his fellow pledges. Suddenly, his body began to soften and expand as a double chin unfolded, his pants growing tight as his waistline inflated and his thighs doubled in size. Astonished by this sudden gain, he jiggled his bigger belly and … smiled? Was he enjoying this? He’d been trying to gain weight all his life, and now finally achieved his goal in under a minute?
His brothers rushed in for some congratulatory belly rubs and, seeing what the cream puffs did for him, offered him some Pfatter U chocolate-chip cookies. More force-feeding! How could they?
So, in conclusion, as you can see … hazing … is bad? 🐷
#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Layton, a senior Fashion Design major, realized that his Pfatter U classmates had a real problem: at the rate they’re all packing on the pounds - some of them instantaneously! - they needed fashion solutions that grew with them. So, Layton came up with his Bloatwell brand, made with a proprietary fabric designed to keep up with the growth of our ever-expanding student body.
After seeing the success of his everyday collection, some of our athletics coaches reached out to Layton to design sturdier uniforms for their players. Here’s a video Junior baseball player Seth as his new girth tests the limits of his Bloatwell baseball jersey!
Watch Jeremy, Marcos, and Josh model more pieces from the Bloatwell collection by joining our Senior Class tier!



#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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Believe it or not, Pfatter University has a group of student amateur bodybuilders - they call themselves the Heavy Lifters Club. You can often find them at the fitness center, doing their best to avoid the Pfatter Fifty that their classmates so easily succumb to. But with so many ways to get fat on our campus, it’s inevitable that some of these lifters will end up much heavier, and not in the ways that they intended! 🐷😉
One of their members, Chase, added a scoop of GroBig to his pre-workout. Or was it two? He wasn’t really paying attention. Before he could leave his dorm for the gym, the powder’s effects really set in. Now he’s round and soft like a yoga ball and weighs much more than his max squat!
Which one of Chase’s fellow club members is wearing a Thinner compression shirt? Who gives their chubby roommate some belly rubs? Which one gets a turn in the Thickening Machine? Find out by joining our Senior Class tier!




#college weight gain#guys gaining weight#ai fat#ai fat men#gaining weight on purpose#male gaining#pfatteruniversity
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