His penis was held right up against his belly, buried in a tawny fur-covered sheath like a dog's. He touched it, and his penis was hard, but he knew he wasn't erect. The sheath swayed a little from side to side.
Alex really had to pee and tried to will himself to release but somehow he couldn't go. He realized he might have to do it the dog way so he got down on all fours and lifted one leg over the toilet. He nearly fell over but balanced himself and finally the red tip of his stiff canine penis emerged. He heard the jet of urine hitting the water and looked back, marveling at the very dog-like scene behind him. When his bladder was empty, he put his leg down and lifted himself back upright.
Alex looked back down and could barely take his eyes of his strange new private, droplets of urine falling from his furry sheath.