Cody smiled to himself. Regardless of what his brother thought, this was fucking awesome! He had a huge cock that could seemingly cum over and over, and it felt at least twice as good as his previous human dick. After they had dinner that night, he had gone straight to the upstairs bathroom, saying to his parents that his stomach wasn't feeling too good. Once there, he had teased his gigantic penis to its full length and over the edge of orgasm at least 6 times. Lucky for him, he used the shower. Wanting to see just how much he came, he plugged the tub before cumming into it. By the time he had finished 2 hours later, there was at least 2 inches of thick, sticky horse cum floating in the tub. It didn't seem possible that he could hold that much fluid, but when you suddenly sprout a 2 foot cock because your brother ejaculates all over the entryway, why give much thought to why?
He had tried so many different ways of using his new tool as well. Sucking himself, one handed, two handed, sucking himself and using both hands, the list went on. Getting to his bed, he stripped naked and plopped onto his back. "Fucking amazing!" Cody said happily, shutting his eyes. As he tried to fall asleep, his young mind was drawn to images of some of the girls at his school. Thinking of a few particularly hot ones, he smirked as he felt his horse cock begin to throb in it's sheath, hardening and sliding out. Since it was a hot day out, Cody slept on top of his covers, allowing his behemoth to lengthen uninhibited. As he half-dreamt of the things he'd do to these girls with his new man meat, his member began to heat up. Imagining the way those girls would worship his cock, how they would suck it and play with it, drove his teenage mind to new levels of arousal.
A sudden pang of pleasure shot through his now rock hard horsecock, startling Cody. He had never been this turned on before, that he could remember. Resisting the urge to reach up his length and rub one out, he opted instead just to tease it. As his mind churned out sexier and more arousing thoughts, they started to increasingly include horses. First, it was just taking place in farms, close to them. Then, it shifted to the girls teasing the stud horses, playing with their huge lengths. Before he knew it, he was imagining horses just straight up fucking each other, with each increasing thought spurring on the tension in his massive cock, pre flowing out liberally now, pooling on his chest.
As he finally imagined himself fucking some beautiful mare, it was too much for his hybrid libido to handle. With a whole body shudder, his dick reached nearly to his head, bobbing above it. Orgasm began slowly, a small river of cum pouring out of his huge slit. As he realized what was about to happen, his eyes shot open and he sprang up from his bed and towards the open window. All too late though, his next pulse spurting out in a long wave, covering the floor underneath him. He made it to his window for the next one, guiding his huge horse cock out the opening and thrusting his hips in time with the sprays. Rope after rope tore out of his dick, covering their backyard in little puddles and chunks of equine jizz.
As his gasm wound down, his cock deflated quickly, slapping against the wall of the house. Cody looked down, seeing at least a cup or two of slimy cum plastered to the wall and floor, as well as his bed.As he realized he had to clean this mess up before any of his family came in contact with it, all he could say was "Aww man..."