As he held his new horsecock, Steve noticed that it was still growing. Its girth increased until it was like holding a black pool noodle. Beneath, his balls dropped lower. They too were covered in thick brown skin.
"Damn horses are lucky. I gotta test this thing out." Steve said. He stepped out of boxers and waddled to the bathroom. The slightest rub against his thigh or hand and his cock would twitch. He knew he was close, Steve could see a trail of pre left behind him.
He sat down on the edge of his bathtub and proceeded to move his hand up the length of his cock. Now fully erect, his new shaft was probably 18 inches long. The horsecock throbbed and pulsed with every stroke. Bobbing up and down in front of him, Steve had trouble keeping his balance on the tub. His legs all but gave out when he finally came.
Thick spurts of cum splattered against the white tub. It wasn't human cum, it was horse cum. Sizable yellowish chunks of cum at smelled. Steve would have been disgusted if he wasn't so overwhelmed by his orgasm.