This story was not written by me it was sent to me. Therefore I cannot take the credit for writing it.

Chapter 1: The Beginning

In the beginning I was a normal young male child with what I seen as a protected life which I feel caused me to be secluded later on in my teens, growing up with only two other friends through out elementary and secondary, all the way to high school. Being

sexually aware teens we would be ogling the females in the school but we would never allow our discussion out of our group due to rejection and ridicule from the females and their friends, this set the stage for my urges a little later in life. I grew to be a still

secluded but fully-grown brown eyed brown haired 6ft tall man with an over active sex drive that with no real outlet caused my self to look for other means to relieve myself.

In the years to follow I would try to relieve my sexual urges in any way I could usually I would use the proven method of relive with masturbation but I found this would become less exciting as time went on. In turn this caused me to look for another type of relief but I was still to shy to date, in my mind females were the Holy Grail I had to cross a sea of

misery to obtain.

I continued on with my life regardless of my urges and became a honour student in genetics in my mid twenties, I continued in this field until I was rejected out of the scientific community due to my experiments with genetic manipulation. This forced me

to continue my experiments in a more private ocation; my goal was to create a non-specific genetic pattern that would allow myself to change my skin texture, height weight, and my true goal to change species. I had realised in my earlier years that animals had an advantage over humans, they had no elaborate mating rituals as humans have, for them if your bigger you get to mate. This intrigued me for I would be able change species and from there adjust my body to the needed dimensions or other factors to achieve breeding rights.

This seemed to me to be the solution to my problems allowing my self to be drained of my urges then return to my human form. I would continue my experiments for another five years until finally I succeeded I created a solution that once injected allowed my self to become a shape shifter. I was delighted I took a long deserved sleep once I woke I

realised what I succeeded last night I returned to my lab and impaled myself on the syringe, I was ecstatic of the possibilities and realised I would have to try it out.

I would have to find out how to activate the genes in my body I first attempted to change my skin texture after a few days of practice I mastered this field changing texture or colour was a snap for me. I continued on to morphing my body, this proved to be more difficult but after a week this as well came to be an easy task I could chance height weight and slightly my shape I truly enjoyed this. This did still not satisfy me and I continued on with species changing, I would concentrate and after a gruelling hour I shifted into a dog this was the moment I was waiting for I had achieved my goals. I bound and leaped in excitement but I had realised I had to go outside to find other dogs, but to my distress I was locked in the house. I tried to shift back but nothing I truly was worried would I be stuck like this, will I starve who will feed me, due to my solitary life no one knew what happened to me. A long five hours later I changed back with little effort then I realised what may be happening I can only change once every five hours and days later my theory

was without a doubt proved to be correct.

After a few alterations to the doors on my home I was ready, I changed back into a dog and set out towards the nearest neighbours, which as it happened was a farm with all of farm type animals, and four dogs, once I got into the farm yard, the dogs came toward

me, as if greeting me.

After a smelling and licking session, I thought I was ready to go. It at that moment, I realised that one of the dogs was behind me and a very large male, at that. I wondered what his problem was. The closer I got to the females, the more excited I became. I was hoping for a fuck.

It was then, that the male jumped onto my back. I was scared, because I didn't know what he was trying to do, but when I looked back, between my legs, I realised for the first time that I wasn't a male anymore. But that I was a female. I now had a swollen cunt and no balls.

I think that was when I realised that my in my excited state, I had been left smelling like a

bitch in heat, and I also realised thet when I had changed I was actually on heat. I also realised that the big male was trying his best to breed with me. Not being too sure of myself, I tried desperately to get away from him. When he growled and bit my neck as

he clamped his forelegs tightly around me, it was as if he was saying "oh no you don't you're mine."

He jerked haunches back and forth against my rear. I felt the pointy tip of his cock jabbing and searching for the opening to my furry slit. This was totally foreign to me, but I liked the feeling. I couldn't help myself, I lowered my rear, to meet his thrusts. Each thrust became stronger and his cock grew a little longer, then when he shoved forward

again his the tip of his cock parted my cunt and he shoved it deep into my hot slit.

Up until then I was loving every second of it, I felt an unfamiliar feeling growing inside my cunt it was like nothing I had felt as a male, it was slightly similar to the orgasms I'd had as a man, but this was totally different it was stronger and more concentrated.

I rocketed through that first orgasm as he continued humping in and out of my puss. By this time his cock felt huge in my cunt and to my surprise it all of a sudden felt even bigger as his thrusts pushed this lump into my cunt. I howled as his lump was forced into me. I felt totally filled, it was incredible feeling of his cock deep inside of my new cunt.

My new lover just kept flexing his huge cock inside my swollen cunt, until I felt his cock start to expand even more, as he rewarded me by squirting his seed deep in my cunt, this drove me over the top once again. I felt faint from all the pleasure but I hoped that it would soon be over. It took what seemed like hours before he subsided, enough to pull

out. I marvelled at the experience I had felt with this dog, I knew from then on, I and nothing would ever be the same again.

I left my new lover an hour later when his knot was removed and he was satisfied with his handiwork once I reached home I realised I had another three hours till I could change back so I figured that I could go looking for more potential suitors. I continued down the road until another friendly farm dog greeted me this one was even larger that the last. His reaction to my smell was instant, he knew I was horny and he wanted some of me. As I tried to lead him to a secluded place for some fun, he started icking at my cunt this was driving me nuts his tongue was dipping inside my slit licking out the cum still left after

my first lover. He continued to lick me out through another orgasm after he was finished with that he mounted me right away he jammed his cock right in to my waiting cunt I realised I may have gotten myself in a bit over my head due to the size of his organ.

His cock was huge in looked a foot long and I knew I would never get his knot in to me for it was the size of a grapefruit and it was still not hard but I thought it would just hit my cunt lips and bounce their. His cock was a good three inches in diameter and I was loving ever inch of that beautiful cock his thrusts were so powerful he would almost knock me to the ground. His cock now fully sized plowed its way deeper into my cunt the waves of pleasure washed over me I was having an orgasm after orgasm then his knot

was bumping on my lips but I was in such heaven I did not worry. His knot being the size of a football hitting my cunt was making me explode with cunt juice that my opening grew with desire and his knot began forcing its way in with all the lubrication I was

leaking.

Slowly my cunt allowed his knot in due to his powerful thrusts my lover was creating it was incredible the feeling was making me howl with passion. The pounding he was giving on me finally forced his knot inside me this sent me over the top three times in a row my first multiple orgasm. When I calmed down a little my lover was on his last thrusts and he came, the sheer amount of all the meat and cum he put inside me was stretching my dog cunt to its limits I was loving it all so much I never noticed the owner watching us. When he finished coming he turned us ass to ass like most dogs do and I ended up looking straight at the owner she was beautiful long blond hair blue eyes so naughty looking. Her body was incredible long legs shapely hips slim stomach huge

breasts and a voice of an angel.

"I am glad some one else decided to help me satisfy him," she spoke to me while petting my head. I was dumb-founded did this mean that she would have sex with this beast?

"He sure has you filled up tight doesn't he," she spoke. "Well at least he didn't rough you up to bad."

I couldn't get away so I stayed there and listened to her until our lover pulled out of me with a wet pop and I was free I watched with amazement as this beautiful blonde dug some cum out of my stretched cunt and sucked it in to her mouth. This had me watching with undeterred concentration that when she finished with that hand full she took her lover and

left but stopping and saying.

"Do come back now you hear," in a naughty voice.

I right away made a beeline for home once safe inside I changed back to my original form this was a day to remember and I swore that I would take her up on her offer.

Chapter 2: The Deception

The first day of being able to shape shift went on with only one hitch that I could only change my body size, shape, and height when I was in my human form this proved to be an surprising realisation. After my fist day of experimentation with my new doggie friends with their doggie cocks pumping into my newly found dog pussy rocketing me

through multiple orgasms. I came back home and curled up on my bed once the five hours were up I changed back and fell into a satisfied sleep once I woke I ate and showered as if nothing happened yesterday. Once I was ready I decided I would try my adventure again but I would visit the larger second dog and his owner the beautiful woman {I later found out was named Brenda}. I concentrated again and turned back to

my doggie form and set out to my new partner's home down the road, when I showed up my lover was happy to see me.

He bounded up to me with a little yelp and a hello sniff I decided to return the favour and gave his sheath a lick he like this so much he gave me a lick that sent me into the clouds but I didn't let it go further right then. I wanted to get his owner Brenda outside to play with us so I gave a bark and a yelp and to my surprise she looked outside right away and came outside to see my lover and me.

"Ah so you are back you couldn't get enough of Ralph could you?"

I was stunned she was wearing a tank top and cut off jeans, which was highlighting all her curves that sight made me so horny. I started to get Ralph worked due to my juices I was now leaking, his cock now was pointing out a little and he was whimpering to me I realised he want to get some and Brenda seen this to.

"Oh my little Ralph has a hardon for you does he?" she then came towards him and started to pet his back but what surprised me was she moved down to his belly and started to rub his cock.

I'll take it from here if you don't mind" she whispered.

She continued to work his on his member as she stroked it grew out of his sheath and into her hand I was watching with amazement as this beautiful woman was beating her massive Great Dane off in front of me. She just continued to beat him off in front of

me until she just stopped and walked away but Ralph was in close behind with his hardon so I figured something must be going to happen so I trotted along behind her and I was right. She entered a barn that was near by, as I entered the barn I seen some horses over along the one side in there stalls but what caught my attention was some sort of bench in the corner and it was all padded. My curiosity was right Ralph ran up to the bench and stayed there I wondered why but when Brenda knelt down on the bench and Ralph

approached her with his hardon still hard as ever I knew.

Ralph began to mount her doggie style my mind was blank, Brenda was going to be fucked by him I could not believe what I was seeing this beautiful woman was going to willingly get fucked by that huge dog. I was watching her go at him dumbfounded as she

guided him on to her, his cock was big and red but I knew it would get much bigger before he was done with her. He wanted to push his cock inside of her, but was bouncing off her ass so she reached back and helped his aim and he jumped forward sinking his

cock inside of her while she groaned with lust. Ralph started to pump his cock as deep as he could into his lover all the time she was yelling, "yes, yes fuck me hard oh yeah!" I could see his cock had grown twice its size already. His knot was already well pronounced, but was still not up to her lips yet; Ralph was still pumping his cock inside of her and was growing in size and length with ever thrust. Brenda was in the clouds moaning and pulling at her erect nipple then with her other hand started to rub her swollen clit so I decided I would help her and got beside her and started licking her cunt with him pumping into it. This effect of pumping and licking started to send her over the top she came a good three times yelling out and bouncing back into his thrusts. I could see Ralph's cock pumping in and out of her cunt with the knot know full size bumping

against her cunt lips this was sending waves of pleasure through her body.

Ralph's knot was huge like the size of a foot ball and it was pushing against Brenda's cunt lips, to help it slip in I began to lick it to lube it up to slip in to her cunt which made him pump even harder. Slowly it slid forward stretching her cunt lips wide Brenda began to scream with pleasure he was pumping so hard that it all of a sudden plopped inside of her hungry cunt which sent her cumming once again. Once Ralph was in here cunt he just kept pumping as hard as ever which was making Brenda's cunt lips suck in and bulge out with every thrust of his cock, that sight of her cunt moving in and out with him sent me over the top. After I calmed down I began licking her cunt again and I was rewarded with Brenda's and Ralph's love juice I gladly licked them clean once they were done he turned ass to ass with her making her cum again. Once she calmed down she called me over and began to massage my cunt lips and sent me through three more orgasms, after all that we all just relaxed and a little later Brenda's plugged cunt poured the trapped cum out.

After that experience I was absolutely soaked I was so horny my cunt seeped a constant river of fluid that Ralph was picking up on and was gathering himself for another go Brenda was continued to relax in the corner as we started again. He gave my cunt a

nice sniff and was sure I wanted to get bred again so he jumped on my back and started to search out my cunt with his extending cock. I could feel his tip poking at my cunt and he slowly pumped his cock inside of me his motions now matching mine thrusting his cock as deep as he could. His cock now full size I began to feel that familiar feeling his knot was beginning to bump on my lips as he would thrust it deeper in to my hungry cunt but as I looked toward where Brenda was sitting she was gone. As I scanned the room I seen her over by the horses where she was rubbing the sheath of the huge animal and to my

surprise it was humping her hand while its cock still was growing. Brenda got down on her knees and started to rub that three-foot long cock on her breasts rubbing all the precum into her tits the sight was so hot I came with Ralph's cock buried deep inside of

me. As Ralph was pumping in my cunt his knot was slipping inside due to all the juice I was spilling then the satisfying plop of his knot slipping inside, I came right on time to see Brenda's lover shoot his cream on her tits while Ralph was shooting his seed inside me. The feelings and sights were over whelming to cause me to cum and cum over and over again, after Ralph and me had finished we went out side to see Brenda again, she was laying in the sun on the grass naked covered in horse cum. So we laid down beside

her as she dried after she finished I decided I would leave them alone now so I slipped away to my home down the road.

I decided right there and then I would become a horse for my next evolutionary jump in my sex adventures and I would have to learn why I couldn't change into male animals because I was eager to explore that angle of these escapades.

Chapter 3: The Deception Continues

After I returned home I waited out the rest of the five hours until I could return to my human form. I set out right away to transform into a new animal namely a horse. It took me a good two hours to master this. Once I was in my new form I set out right away to Brenda's home and her stallions. Of course a horse on the road would attract attention

that I did not want so I carefully stayed in the trees out of sight. Once I reached her property I leaped. I cleared the fence by two feet and trotted up to the barn and as I hoped, a stallion met me in the pasture. While still far from the house we greeted each other with some neighing and smelling. Once he began to test my fertility I got very exited and my juices began to flow. He picked up on this right away and began to extend his cock. The