Size Stealer

Someone steals Dan's big cock and then fucks him with it

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This is a story inspired by some porn games I play regularly and a scenario I've had on my mind for a while, everyone in the story is 18+ and the story contains elements of fetish and kink that might not be suitable to everyone who isn't a horny freak like me :D


I'm Dan, I'm a 24 year old who never really hit puberty in most ways, I am completely hairless, only 5'6 and very weak and scrawny, I'm lucky I don't have to wear glasses otherwise I would probably get wedgied more than I already do. The only lucky thing about me is I was blessed with a lovely 8 inches of cock, which often hung halfway down my leg so I had to keep it nice and tucked in with briefs or tighty whities, easy targets for bullies. A bully like this construction worker, John, who I walk past on my way home, somehow every time I finish work, he's out having a cigarette break. 10am after a morning shift, 7pm after an afternoon shift, heck I bet if I did night shift he would be there at 3am in the morning waiting for me.

He liked to mess up my hair, call me names or sometimes even slap me on the ass as I walked home but that's all he really did. I should mention that he is this 6'6 giant behemoth of a man, broad shoulders, massive hands, massive legs and I can only imagine what's underneath his workers uniform. He totally towered over me every time I walked past him so I got used to walking very fast to avoid his torments.

I was up late at night playing some Valorant and League of Legends with my friends and we were joking around HARD, we had the past midnight giggles for sure, one of my friends even turned his Discord camera on AND was FLOPPING his dick around like a fish. I laughed so hard I PEED myself. This wasn't too unusual, I was in an accident as a kid and my bladder was damaged so I often had trouble with incontinence, especially while relaxing at home. Luckily I was prepared.

I really wanted to keep playing with my friends so I excused myself for  5 minutes and went a grabbed one of my spare diapers, it was a nice, cushy plain white one which would easily hold as much pee as it needed to for the rest of the night. I pulled my pants off and laid back on my bed, putting my legs up as the cool air hit my dick and ass. I quickly put the diaper on, folding it over myself until I was fully fluffed up. Unfortunately, since I had to accommodate my huge dick, I needed extra large diapers which meant I couldn't wear anything over the top of them so I slowly waddled back to my desk and sat down on my gaming chair, the diaper elevating me a bit higher than before.

I hadn't noticed the shadowy figure at my window as I resumed gaming, having fun all night with my friends as I felt like my gaming skills had gotten better in my diaper, we won lots of matches and I felt great being able to freely release myself at my desk. Finally it was almost 7am and I was ready for bed, I said goodbye to my friends and waddled back over to my bed, I figured I would just sleep in my diaper and my incontinence would have sorted itself out once I woke up.

Just as I was about to crawl into bed, my phone went off, my boss was ringing me...

"Hey hey, hope I didn't wake you!" My boss said enthusiastically

"Hey man, nah you didn't wake me, I'm totally always awake at 7am" I lied sarcastically

I had a great relationship with my boss, he was a great guy and helped me out a lot when I needed time off and in exchange, I helped him cover hard shifts since I was always happy to get paid extra money.

"Haha, late night session huh? Sorry to do this but could you cover Katie's morning portion of her shift? It's just 7-10am, she called in saying she was dealing with some family business and wouldn't make it, I'll shout you a free meal?" My boss didn't often offer fully free meals so I guess he really needed the shift covered.

"Yeah sure man, I'll head in ASAP, I'll just throw on my work clothes" I replied, it wasn't ideal but 3 hours was such a short shift, I figured I could just crash the rest of the day.

"Great! I'll see you soon" He hung up and I sighed, I noticed a blur at my window and I turned around but nothing was there, feeling a little creeped out, I walked into my bathroom to take off my diaper, like I said, I couldn't really wear anything over the top otherwise it would be super obvious at work. I threw my diaper in the trash can and chucked on a pair of clean work clothes.


Work passed by in a blink, I was a bit of zombie by the end of it but my boss thanked me anyways and I enjoyed a nice, free meal at the end of it. I luckily didn't have anymore incontinence troubles but mainly because I hadn't drunk anything while at work, now after my meal and having some water, I was feeling a bit of the urge to pee but thought it would be fine until I got home.

I was now feeling even more zombie-like and walked home at a snail's pace, slowly putting one foot in front of the other as I walked home, looking down at the ground, trying to keep myself awake while using as little as effort as possible.

Due to my fatigued state and the fact I wasn't looking where I was going, I ended up walking into a wall, or something I thought was a wall which actually turned out to be man. Specifically John, the construction worker I mentioned earlier. I hadn't even thought about him being out here on my walk home, but it was still unusual for him to be standing directly in the footpath. 

"Oh, I'm sor-" I tried to mumble out but was interrupted by John wrapping his arms around me and pulling me into him, my face pressed into his stomach just above his crotch as his hands snaked down and started groping my butt. The way they moved, was almost like he was searching for something, I was very confused and tried to pull away but was too weak and tired to make a proper attempt.

"Heph, washs te dea?" I managed to get out against his body

"Hmm, I can't hear you down there, let me help you out champ" His deep voice boomed out and one of his massive hands moved around, placing itself underneath my crotch as he LIFTED me up with one hand, bringing me eye level with him as I was practically seated in his palm, my legs dangling around his arm towards the ground. He used his other arm to steady my shoulder but he needed pretty much no effort to lift my tiny body as gravity caused my crotch and taint to press deeper into his hand. He squeezed his hands a couple of times, still searching for something and not finding it.

"Hmm, interesting, not what I expected to find" He said casually, like he wasn't actively holding another human in his hands.

"How are you doing this? Don't I weigh anything to you? What did you expect to find?!" My words were rushed by panic as I could feel pressure building in my bladder, this was NOT the time to pee myself but John's hands were pushing slightly against my bladder and I wasn't going to be able to hold it for long

"Oh you weigh almost nothing, I lift like double your weight with no worries" John chuckled.

As if to reinforce his point, he lifted me higher above his head, and also started zooming me around like a spaceship, he even laughed and made the spaceship noises. If anyone else was around, they would probably think a dad was just having some fun with his son, not two adult men being involved in whatever this is!

"And as for what I expected to find, I don't know, I just expected you to be a bit...fluffier..." He dragged out that last word and smiled, did he know my secret?! I suddenly remembered the blur outside my window, had he followed me home?! How much had he seen?!

"Listen man, I don't know... what you are talking...about" I grunted out, doing my best efforts to hold in my rising need to piss all over this man's hand. I needed to get out of here, call the police or just hide, anything but this!

"Oh? Then you won't mind if I have a little fun with my baby girl, right?" He said as he started bouncing me in his hand, his fingertips pressing into my taint and the tip of his thumb pushing into my bladder.

'Baby girl'? What was he talking about? I was clearly a boy- A MAN and I wasn't actually his child! If he didn't know I was boy before, he was definitely about to find out as I could feel the friction of his hand rubbing against my dick, making it grow and stretch against the fabric of my undies.

"Oh my" He said excitedly, caressing my growing monster shaft  "I definitely didn't expect this! My baby girl's got a monster hiding in her pants!"

There he goes again but I couldn't even try and correct him as I was to the point of bursting.

"STOP please! Please stop, I'll do anything, please put me down!" I cried out, hoping his human side would come out and he would release me before I did the unthinkable. 

He did stop but only to offer me a proposition...

"Anything you say? Alright then, I'll put you down, if you drop your pants and show me how big that monster really is, I'll even let you pee on that grass..." I started to shake my head, we were in public! No way I could drop my pants, even if there was no one around but he interrupted my thoughts with the other half of the offer. "Or I could keep bouncing you around and make you piss all over my hand, then spank you raw like my daddy would have done me if I had an accident in public? Which is it?"

I couldn't imagine walking ever again if this man's gigantic hands spanked me plus I didn't want to soil my work clothes if I could avoid it so I quickly nodded, agreeing to his deal, hoping that would be the end of it.

He slowly placed me on the ground, my legs hitting the cement as I stablised myself but before I could turn to the grass and piss, his hands were already around my waistband and with one motion, my pants and undies were dropped to the floor and I was standing there, 8 inch standing proudly right at him, I could feel the sun beating down on my asscheeks as well. I tried to cover up but he held my arms, marveling at my cock size.

"P-please, let me pee, I need it so bad" I whimpered, rubbing my thighs together. 

"Alright baby girl, off you go" He giggled and nodded his head towards the grass, I bolted over just as the piss started streaming out of me, leaving my pants and undies behind as I released my torrent of piss onto the grass, it felt good to finally relieve myself but I was so distracted, I didn't notice John sneaking up behind me. I was so lost in peeing, I subconsciously bent over to spread some of pee along the grass, rather than all of it in one spot plus it helped the pain in my bladder immensely by bending over slightly.

My ass was sticking out enough that John took advantage and started poking my hole with one of his meaty fingers, or at least that's what I thought he was doing until I felt something slip inside me, not a finger, but something small and oval shaped. I bolted upright, my piss stream still going as I desperately tried to grasp at the thing entering my ass but it was too late, my hole sucked it up and it was inside of me.

My piss finally ran out as I turned around to John-

"What the hell was that?! What did you put in me?" I could feel whatever it was growing smaller and smaller as a new sensation started rising up from my crotch, something heavy and heated. 

"Oh, it's a special pill that will alter your body chemistry, and allows you to take someone else's size when you fuck them, or allow someone to steal your size if you get fucked. I just figured we should make things how they are supposed to be, right?" As he explained this fucked up pill to me, he dropped his construction worker pants and revealed that he was commando underneath, the biggest surprise was his tiny cock, it looked so small against his huge body, it was maybe 4 inches on a good day. 

I realised what his plan was, he was going to fuck me and steal my cock from me! My one blessing from puberty, I couldn't let this happen, if I was left with something as small as his, I would never be taken seriously again! I had to get this pill out of me! I started panicking and didn't hesitate, shoving a finger up my bumhole and trying to grab the pill with it. John laughed at me and started stroking his cock. I knew I didn't have much time until he fucked me so I had to get it out NOW.

I dug a second finger in and the pain made me collapse forward onto the ground, face down ass up as I desperately finger blasted myself trying to save my cock from this man. I dug deeper and finally grasped it between my two fingers! Yes! I could do this and save mys-

SMAAAACK

Two resounding spanks hit my ass as John brought his meaty hands down on both my cheeks at the same time, clasping them with his mitts, it was like I was shot by a gun, I cried out and dropped the pill due to the pain as he pulled my cheeks apart roughly, stretching my asshole against my fingers as the burning in my crotch kept getting more and more intense.

"You know, if you wanted to stretch a bit before I fucked you with your own big fat cock, you could have just asked" John laughed at me as he grabbed my weak little wrist and pulled my fingers out of my ass, my last hope as I felt the pill finish dissolving inside of me before I felt what felt like 4 of my fingers trying to penetrate my hole when in reality, it was just one of his meaty digits pushing inside of me, stretching my ass wide, preparing it for his cock.

The burning sensation in my crotch had reached it's peak and I looked down at my beautiful, enormous cock one last time as John grabbed both sides of my hips and pulled me back onto his cock, he was able to bury it balls-deep inside of me with one thrust as he still didn't have much of a cock. He pulled me back and forth, using me like a fleshlight, his balls not even slapping against me due to how small they currently were.

"That doesn't seem very comfy baby girl, why don't we move somewhere else?" John wrapped his arms underneath and easily lifted me into a full nelson hold, still pumping inside of me as we walked towards the house he was doing construction for. He nudged the door open and walked me inside, it was a beautiful house, as we bounced up the stairs, each step pushing his cock as deep as it could go inside of me, I wondered why my dick wasn't shrinking yet, it was still standing at full mast, all 8 inches.

He waddled me into the bedroom and I realised why he had brought me inside, a floor to ceiling mirror stood instead of a wall in the bedroom and I was able to see just how ridiculous this situation was. A tiny little twink being held by this absolute mammoth of a man but only this tiny little pinprick of a dick was pistoning in and out of the twink, instead the real monster was flopping about all willy nilly, dripping precum everywhere.

Being forced to watch myself get fucked only made my crotch burn more and I could feel my orgasm approaching, I knew John's was coming too as I felt his cock swell up a tiny little bit, preparing to dump his load in me.

"You are probably wondering why you still have the wrong sized cock, well the pill doesn't actually take effect until I cum inside of you, as I pump my love deep inside of you, it will slowly shrink your cock and inflate mine, but fun fact, because it works by cumming, if there is no cock to steal when you cum, you instead lose your cock entirely! Since you know, you are effectively swapping your dick for 0 inches. Do you understand what I am saying, baby girl?" John lectured me and finally, everything clicked, why he had been calling me baby girl, why my dick hadn't shrunk yet, if he cums inside of me and I cum, not only will he then be fucking me with my own 8 inch cock, but mine will disappear and I'll be left with a vagina, he intended to turn me into a woman!

"I've been waiting to fuck you for so long, and now I'll have the dick.. TO.. DO IT!!!" John screamed as his tiny cock spat out a pathetic amount of cum inside me but it was enough cum to trigger what John wanted. He grabbed the sides of my head and held it up as he forced me to watch what was happening to my body in the mirror. 

I looked on in horror as I saw my once proud dick start shrinking, the inches on my meat getting shorter and shorter by the second, not only that but I felt John's member still inside of me growing, pushing against my prostate before stretching my sphincter even wider, until finally, all that remained was a pinprick thin penis in front of me, a cock befitting the hairless twink that I was.

"Whoaaaaa, this thing is amazing! I can feel so much of your ass now baby girl, and look at this!" John took his hands out from under my legs but his penis was so firmly stuck inside of me, his rod was keeping me upright all by itself, he started bouncing me up and down, shaking his hips but nothing could detach his meat from my hole. 

So there I was, seated on John's junk, thinking it can't get any worse when I felt him move his hands to my now tiny cock and remembered what was going to happen next. Something woke up inside me and I started thrashing around, screaming, wailing trying to stop him but it only caused me to slip slightly off of his cock and I SCREAMED as it felt like my flesh was being torn from within.

John only laughed at my pain and misfortune and kept stroking my cock, although stroking it is a bit of a wide term as one of his hands could pretty much cover my entire cock and balls so it was more like he was pinching it and shaking his hand. Before long, I felt my orgasm building and as much as I tried to fight it, it was futile, I moaned as sticky cream started shooting out from me, except unlike my usual ropes I shot, it was barely 3 strings of semen when I was finished cumming.

John made me look into the mirror again and I stared in horror as the burning in my crotch increased tenfold as my dick started shrinking again, getting smaller and smaller until I had nothing but a flat mound, like a Ken doll. John ran his fingers over my mound for a second before retracting them as I watched the mound start sinking into my skin, lips forming and next thing I know, I have a vagina staring back at me.

I was still in shock, this morning, I was proud of my big hanging dick, now here I am staring at my new genitals, wishing I had done more with my penis before losing it, possibly forever. 

"WHOO YEAH, that's what I'm talking about, I gotta try me that thing NOW" John hollered in my ear and I braced myself as hard as I could but nothing could prepare for how painful this next part was going to be. John grabbed my hips and pulled as hard as he could, but his cock had swelled up to the point of becoming bigger than my ass cavity so each pull felt like it was dragging my organs with it and only got me half an inch of his penis each time. 

Finally he gave up trying to do it standing and bent over, dropping me to the floor as I was on all fours again, his foot pressing down on my head as he pushed away from me with all his might as I screamed beneath him, his shaft finally breaking free of my hole. Everything inside and outside of me felt broken and I could do nothing as John grabbed my legs and flipped me over, pushing my legs up to my shoulders as his gigantic mushroom head pressed against my new entrance.

This time, he was nice to me as he didn't have a small cock anymore so he slowly pushed himself into me, stretching my new organ wide as I moaned loudly, he wasted no time pistoning in and out of me as he destroyed my new virginity. He reached down and started rubbing my clit furiously, I threw my head back, moaning widly while bucking my hips into him. 

I reached my second climax quickly, my pussy tightening around his cock and he groaned loudly, his cock throbbing inside me as he pumped me full of his semen, this time his heavy balls filling me to the brim as I felt his cum start leaking out of my pussy. I felt fuller than I ever had before, my brain was spinning as I felt him pull out of me.

I couldn't move, could barely breathe so I had no idea what John was doing as I felt him lift my legs and ass up again, and start fiddling around my crotch area. I looked down and saw a fluffy pink diaper covering my genitals and ass, I could feel the cum leaking out of me into the diaper as John finished securing it and picked me up, putting me on his hip.

He carried me out of the house and all the way down the street back to my own house where he laid me down in bed and I collapsed from the exhaustion.

"See you later, baby girl" He said as he left my house and went off into the day, leaving me alone, I didn't know what was going to happen next but I prepared myself for my new life.


If you liked the story and have any other transformation you want to have happen to Dan, let me know and I'll happily write them into a future chapter :) Thanks so much for reading! <3


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