Deep grooves began to run down the sides of his legs. I was captivated by these deepening bloodless gashes that in mere minutes began to bisect his legs. My arousal was replaced by an amalgamation of fear and curiosity and I could not help but continue to witness this amazing process.
When his legs were completely divided into 4 smaller limbs, his toes immediately began to curl up and and his legs began to get really hairy. I watched as his ass seemed to grow larger and larger until finally his loincloth ripped and fell from his body. That is when I was able to see that it was not just his butt that was increasing in size.
This strapping lad's entire pelvis was shifting and growing to accomodate a new form. The back part of his legs, his testicles, penis and posterior were moving farther away from the rest of his body and everything below his waist seemed to be sprouting a thick layer of coarse, chestnut brown hair. Apperently, a tuft even thicker, darker hair grew from a thin appendage above his ass.
I turned my eyes to his face to see his reaction to this bizarre virus's effects, but I found that the agony of the changes overwhelmed his psyche and left him unconscious--his face still contorted with pain.
I contined to monitor his progress and it proceded to what was now an obvious end. The ends of his feet had been encased in a keratin shell and muscles continued to develop and the entire pelvis elongated and overall growth resumed. After another 10 minutes, the process was complete and I now had an unconscious half-man, half horse sprawled unconscious in my room--a centaur!
I was still flushed with excitement over the events that had transpired, and was trying to figure out what to do next. I was unsure what kind of response to expect when he wakes up, and if he freaks out, he could cause a lot of damage. Of course, because of his change, he is now literally hung like a horse. This dirty thought caused my arousal had returned full force and against my will I now felt the urgent need to fill the void between my legs. A voice in the back of my head told me that this seemed so wrong, by my body seemed to be asserting it will.
I steeled myself and I decided...
