Unwanted Dog Sex: The Beginning

Betrayal is the first word that comes into my mind when i think of this incident. My body betrayed me. You cant Imagine the embarrassing Moment when i realized what just happened but let me try to explain it to you. Its quite a time ago but this is how i remember it.
I just had finished school and was ready for Collage. I was a skinny Guy, Not very muscular but because i did jogging a lot and still do i have relativly thick legs and a big ass. I think this actually is part of the reason why it happened. Im 100% not gay so dont get me wrong about this story. I was raped. Sort of.
So i went to Collage and of course i Had to Share my living with someone else to Go there. But at least it wasnt a room like the other Students but an Apartment with two other guys. One of them was Gay but He never approached us other guys in an inappropiate way, He was a cool dude. He also Had a Dog. A big Rottweiler. He just called him Rottie. Rottie was a, lets say playfull dog. He was very agressive sometimes and He often tryed to mount us when we were bending over. Or at least me. I really feel like He was attracted especially to me because of my strong thick lower body. But it was always funny. We never made a big deal out of it. Just jokes about how Gus (the owner) should get him spayed or layed finally. I was actually a little more helpfull with the dog than James (the oder dude) so Sometimes Gus asked me to take care of Rottie when He was leaving for a longer time and couldnt take the Dog with him. Like exactly that Weekend he wanted to meet another guy and sleep at his place. So He asked me to watch over rottie and of course i said yes. the friday was just average i went with rottie Jogging gave him food played with him. Just normal stuff. And on saturday it was quite the same until James announced that he would leave now for a Party in another City and wouldnt BE here for the rest of the weekend. All i could say was NICE. Having the Apartment only for me was so rarely that it was like winning the lottery. So James left and i made plans for myself. But first i wanted to go out jogging with the Dog so He would be more chilled in the evening. If He didnt got enough sport He really tent to be overenergized and annoying. So i put on my shoes called rottie and ran down the stairs. And Then i slipped. It was the last step and i felt on my ankle. It really hurt. I tryed to walk with rottie some meters but i was to cracked to Go for his Run. So i let him pee and we both went Back in. This was so annoying. Because i actually could understand rottie. I needed sport to sleeping better too. So after we went back up into the Appartment i was chilling on the couch and i had an Idea. James had an average sized gymnastic ball and i though about to train with it already quiete some time now. He only used it to sit sometimes and i Had already asked several times if i could use it and He agreed already. So today was the day i thought. I also had the lazy idea, since im the only one at home i would safe some clothings By only training in my old panties. You probably now which i mean. The ones with holes nearly as old as yourself. This one Had a big rip in the left ass cheek but it would be enough i thought to Not be called naked and i also wore a t-Shirt and socks. So fine enough If anyone would come back earlier for no reason. So i was ready to Go for it but it seemed so was rottie. I turned on very loud Techno music and started some exercises By rolling on the ball. Rottie was constantly jumping around me. And i had to push him back several times. This went on several Minutes until i decided to put him into His room, i said sit and closed the door. Or at least i thought so. He stayed there for like 20 minutes before He decided to come back out of the room that i wrongly thought i Had closed behind me. I was at the Moment more relaxing on the ball rather than training. The ball actually Had lost some air over the time so even when a thin guy like me was laying on it,it didnt really rolled good anymore. So i was relaxing on it next to the Couch. My phone was on that Couch so i could watch exercice Videos while i was laying very close in front of it on the ball.
And then IT happend....you see it was just a matter of seconds. I wasn really able to react and i actually was so suprised By it that i couldnt even come up with anything to escape even if i had more time. But like i said it was way to fast anyway.
Rottie approached me from behind and jumped on me. I actually was frightend for a second and tryed to jump up while leting out a small Scream. But here is the thing - Rottie was strong. Stronger Then ever and stronger than me in this position. He was full of energy and must have watched me and my thick Ass for the whole 20 Minutes before He decided to do what He was about to do. So He mounted me and grabbed me at my hips and his whole body pushed me back down. For a second i realized it was the dog and just stopped for that said second to resist. Big mistake. He pushed me down, hugging me very strong around my hips and Then He started to hump. From this Moment on there was No escape. I didnt realized what He was trying to do until it Hit the third time. He Not just humped me. He actually tryed to fuck me. I could feel a hard bone trying to penetrate my Ass but He missed the first time. The second time it hit my left Cheek and got caught up in the hole and then i realized what it might was because it was slipping down my ass crack. But it wasnt just the dick i felt. While it was slipping through my crack. He already started to ejaculate massively. At this Moment i hadnt time to understand that. It was just wet. Wet and slimy. And just after that thought He hit my hole. It went in perfecly. Like He Had practiced that a lot of times. His cum was like lube and the angle was perfect for Penetration. He rushed His penis completly in. His dick was really hot. Like a heating Stick that really shocked me and I started to groan in pain. It was so painfull a tear came out of my eye. My ass never had Taken anything into it in my Life. And since the Techno music was still going on No one probably could hear me screaming. And this was just the starting. Rottie pushed His way all in and was ready to Unleash all His reserved energy. He pounded me fast and hard. I was in agonizing pain and i wasnt able to flee or think about anything to stop it. I grabbed His paws to pull them Off me but he was Holding me so strong. He even barked at me agressivly when i tryed and started to pound harder. This hot glowing stick in my ass full of pain jumped in and out my butthole until Something scary happened. I was so concentrated on the pain that i didnt noticed it from the begining but around the 10th thrust i noticed that Something was starting to grow. His god damned penis was getting bigger and bigger! A rush of fear ran through my body.... followed By Something unexpected.... pleasure. You see His knot was growing big...really big. At this point there was No escaping anymore. But His knot also did Something different. While it was getting bigger and bigger it was really squeezing my prostate. The Prostate is like the male g-spot and If triggered right you are forced to orgasm and cum. And i swear He hit the spot. His knot went so big that i thought i Had a bowling ball in my ass. I also felt so full with a hot glowing stick riding up and down and i could also sense all His cum. While the entry of my ass was stucked with a Bowling ball i could feel that His dick was gliding im some sort of lube that for sure wasnt mine and it got more and more.
But Then like i said the pleasure started. When his knot reached His full size my Dick started to get rock solid out of nowhere. I still tryed to escape But where? I couldnt lay down because of the ball and wasnt able to move an inch left or right before rottie was adjusing me back on the ball. But also with every thrust the pain was acompanied By a Feeling of joy. Remember we were only 20-30 Seconds in when i got hard. And then i moant. One of His thrusts Hit the spot. A big wave of orgasm rushed from my butthole through my body. Rottie went crazy about my moan like He knew He hit the spot and was ready to aim for that place only from now on. The wave of orgasm was to strong. My body betrayed me and my brain started to ignore the pain. It actually didnt really hurt at this point anymore so much. My butthole was squizzing its inner walls all By itself against the knot and rottie continued to hit the prostate....it didnt took long for the betrayl. Just two or three pushs and i started to ejaculate with every single thrust. I wasnt even in control with my ejaculation. I came when rottie forced himself foreward. And a dog can do that very fast. I was braindead at this point the sheer amount of this enourmus uncontrolled Orgasms was Something i Had never expirienced. My body and my brain was screaming for more. And me moaning so loud was really cheering him on to Go all in....and Then it happend. The ball squeezed itself away sideways. i finally was free....or so i thought. But rottie hump continued and while i was pushing my hips down into the ground His dick wasnt removed. He was stucked with His Penis in my ass! And He was strong enough to hold me Up with IT...i groaned in pain again because this Position was very painfull and He also growled really angryly so i moved Forward to place my stomach on the couch and position myself for less pain. It only took a second because i was so close to the Couch from the Begining and rottie sort of let me get back Up because it was better for him too. But of course Rottie in the meantime was still cumming inside me. He would do so for the whole process of fucking me. It was this Moment when He Hit the spot again and my groaning went back into moaning. I had to accept that this was going to happen now until Rottie decides to end this. And He really was enjoying himself to the fullest. He realized that i stopped resisting and went even further. He growled here and there like He was calling me His bitch. While i was holding grabbing His rear legs and hold them close to my ass so it wouldnt hurt again. Imagine a guy like me lying on an a Couch with my stomach while my hips are pressed against the edge of the couch and me ejaculating endlessly to the Rhythm of a pounding dog that was filling me up with His cum and me holding him in place. It was so embarrassing. At this point i had submitted to it already completly. I was carving for more. His hot glowing pleasure Stick that was running in its own warm juice made me Scream for more orgasms now.
And there He was preparing the final blow. He stopped for a second to adjust himself. Giving me a Moment to come back to senses only to get overwhehlmed again. He nearly felt over me with His next thrust But Then He gave it all. My brain, my body was completly shaking, Everything was tingling and i was non stop cumming. I was moaning very loud while rolling up my eyes and my tounge was falling out of my face. i was shooting all my load into the couch while rottie was shooting His balls completly empty into myself. It was such an amazing Feeling at this point now all this warm juice i could feel that was pushed aside By an even more glowing stick with an enourmus ball on my entry. I was begging for more. I wished this would never end.. And Then He thrusted one final time...so deeply i have never orgasmed that hard. My whole body was cramping in orgasm because of this while my dick had stopped throbbing and was cumming like im peeing...and after that Explosion He Stopped. Both of us were breathing heavily and we were catching our breath for like 15 Minutes. In this time i still Had some, i call aftergasms. It just needed him to move a little for me to cum again. Not AS strong AS before but still very nice. I tryed to hold him in place the whole time before rottie tryed to untie. I couldnt actually stop him. He was just a good Dog staying in place. when He turned arround He just did and since we were still stucked together He was pulling me through the room. It was very painfull and so i was crawling on all four Backwards after him. I tryed to shit him out and with a lot of pressure i finally pressed him Out...more like finally poped out. It was like opening a barrel of bear the first time. His knot made a big sound of pop! Followed By a wave of His cum. And then i layed down on the floor. Trying to process what just happend...that dog just raped me, He filled me Up ..and my body betrayed me....i had the biggest, longest and strongest orgasms in my life. My thoughs were only Interrupted By an immense urge to poop and trust me that was No fun. My ass was hurting like hell and i had the urge to poop for hours. Cleaning up that mess and the Couch wasnt funny either. Luckily rottie was tired now and sleeping so i pooped, cleaned and Then showered in peace before i was able to go into bed at like 3 am. My ass was still hurting and IT would for a Couple of days...and of course i couldnt really sleep. I was thinking of going into the Hospital, but how to explain? But i was also arroused again the Moment i though about what just Had Happend. I slept very late and after the second walk Gus was already Back home and took over Rottie. James wasnt here yet and so Gus started also to tell me everything about His date and the great Sex He Had Last night. I was looking at rottie while He talked, standing next to the table of course and rottie looked back to me...we both knew this wasnt over.