The cold feeling of an ocean wave lapping it's way up the beach as the evening tide moved in woke Erin. Sitting up he suddenly remembered that he must have dozed off. His shoes, socks, and pants now wet from the cold ocean currents he jumped up. A fair run along the beach to home he could see the great house on a rocky point. At least a mile of beach lay between him and the stairway up the clift and safety from the tide.
As he watched the size of waves grow that crashed onto the beach he ran all the faster. Erin was amazed at the speed he made over the wet sands. He could sense that leg muscles had gotten much stronger than when he had jogged about at college.
As the stairs going up the clift approached Erin felt his new larger maleness stir. A mad dash up the stairs as a wave covered the base steps made him feel as if he had accomplished something special.
Into the great house and up to his room he flew. The slam bang of his bedroom door and he was now safe, but....
Erin thought his legs should be tied in knots as muscles would be strained from the run and his dash up those long steps. In a second he peeled his pants down to view that neat shaft only to find more!
More, much more his penis had merged with his abdomin and a very pony like sheath of a Shetland stallion now hung from his gut. The big balls stayed in his groin and looked ever so healthy. Kicking his pants onto the bed he stripped clean of clothes for a better look.
Erin was pleased as he saw the new arrangement. He knew that he should really be upset and scared. However the strange twist of fate he made for himself as he sat naked, covered in salve, and then sitting on and against a ponies' hairy hide.
Now too his butt was a little larger, rounder, and very thickly covered in the same color of hair as on his rocking horse steed. A Winter's dappled gray coat of pony hair now grew over his buttocks, and upper thighs.
Erin smoothed his hand onto the hairy hide. The sensual tingle gave him a shiver and then the start of a good erection. He watched wishing to feel with his hands as the sheath grew. At first a jelly soft flat cockhead inched it's way out of the sheath.
Erin thought back to his days in the stables when a stallion was about to urinate he might show the cock end and a few inches of cock to clear the sheath for a release. Memories of how the thing giggled as the horse stepped about. The desire to feel what was so soft and could become so hard. Now he watched his penis move and act as those in the stable. Erin crouched with the sensual desire to feel his soft shaft and make it become a ragging hard.
A gob of salve he began to massage the penis and sheath. The tingle became ever more as he soon leaned on the bed and humped his stiff cock into the air. Thoughts came quickly for the possible sexual encounter of some female, and maybe tonight.
Soon Erin had more salve on his legs and up his buttcrack as the scent of the salve made him even more horny than before. A call for the evening dinner had him excuse himself for going to bed early.
Seven O clock and he could stand no more. Out the window and down to the ground he climbed the ivy which his Father planted fourty years ago. Over the rear lawn and along the stable's brickway he ran.
The thoughts of going to town and finding some or any whore, he needed a release. The castle drive went for a mile down to the main road. He was about to the road when he spied a small herd of ponies.
The very sight of them made his cock stir as if he and Mike were now one in the same. A short leap over the fence brought him to stand ever so near the mares. Walking about the small herd of twenty animals Erin knew some wanted him as much too.
Sropping his pants and shorts his new cock stood out straight for this wonderful occasion. A mare so willing she held her tail high and to one side. Erin looked at her vulva moist with her juices. Slowly he pressed his flat and flared cock end into those lips of equine sex.
Down he plunged, deeped than he thought possible till his sheath touched her lovely black lips of sex. Laid over her back he began to hump her as if Mike the Shetland stallion was there guiding his every move.
The churning in his balls made him feel the surge of semen forcing it's move down the shaft and out into the mare. Surge after long surge of semen roared from the end of his pony cock. Moaning as he humped the sound and smells of sex brought the herd closer. As Erin finished his first sexual romp with a female he looked about to see three more mares in need.
Erin laid over his first mare, cock burried deep in her vagina and beyond. He absolutely loved the feel of her strong hairy back against his chest. His cock still rigid as it hung deep in the mare he looked about at the other mares. The welcome mat was out for him to enjoy three more hearty mares all in heat and filled with desire.
As midnight fell and the moon rose high in the night sky Erin humped his fourth mare of the night. He admired how well he could mount the mares. Better he worked his thighs around the big buttocks of each mare. His moves made it easier with each new conquest, he so wanted this all to continue.
The light of day reminded him that it was New Years eve tonight and the big party was scheduled. As Erin grabbed for his clothes a new and Bigger Problem became apparent.
The hide and hair of the stallion Mike had now grown down his legs and feet. Meanwhile the hair had grown up his belly, back, and chest covering the dark colored skin. Now as he walked along the feel of pony stallion sheath, hair, and hide made him delighted. Little thought of the party Erin made his way to the stables.
Almost absent of mind he found himself standing in a small stall in the stables. As he wondered why he came to the stables he saw a rusty name plate at the stall's door.
"Mike", this was his stall and home. It was true, he was merging with Mike and in time Mike would own Erin.
The though pleased Erin after his first night at raw naked sex. Walking in circles he finally dropped to the straw covered floor. A content smile came over his face as he thought to give a call to that shop in Chinatown. He wanted to thank the ole' man for this fine sexual form. Erin smoothed his hand over the hairy chest and watched with glee as his pony cock grew stiff again.