John fingered his sheath. He still wasn't used to having one. It wasn't attached to his stomach like an animal's; his penis swung freely between his legs when he walked. But it didn't feel human either -- the skin of the sheath moved easily up his cock when he pushed at it, then slid back into place when he let go. It was very soft. The hair on the rest of his body was thick, coarse, and black, but here it was silky -- almost like fur -- and matched the grey-green of his skin.
His cock began to get hard from the attention, poking out of the end of the sheath. It was a deep green, the colour of holly -- he hadn't got used to that yet, either. He let it settle into his palm, closed his fingers around it, and just held it, feeling it swell. It filled up his hand and the head started to slip out past his thumb. Typical, he thought, grinning. Here I have this very large penis, but because my hands are also huge it feels just like when I was human. What I really need is a regular-sized assistant for scale. Maybe Brian could help me out...
His cock began to harden in earnest as he imagined it. Brian naked and blushing. Brian putting a hand on his dark green cock. Brian kissing him, he thought, tweaking his nipples. Brian bending down to kiss his--
John hissed in pain. He'd nicked himself with a claw. Time for lube before he did himself a real injury. He reached over to his bedside cabinet and fumbled around with one hand, trying not to lose the moment. After a quick check that he hadn't picked up the antiseptic ointment instead -- he'd done that once and would never, ever make that mistake again -- he pulled off the cap with his teeth and dumped most of the tube onto his cock, then slipped down to sit on the floor with his back against the bed. Brian bending down to kiss his manhood, he thought.. Brian squatting down in front of him, reaching around to put his hands on John's buttocks...
He was fully hard now. The head of his cock bobbed around as he ran his hands up and down it, bumping against the base of his pecs. If he bent his head down he could almost, almost reach it with his tongue. Brian pressing tight against him, squeezing his dick between their chests. Brian turning around and spreading his legs. Brian opening up as John thrust deep, deep inside him...
John tensed, his head thrown back, and then came. It spurted high in the air, arced over his head, and spattered down over the bed behind him. The room was echoing. He'd yelled wildly in triumph again, he realized. There was no way Brian hadn't heard, but he couldn't help it. It was like his mind had just shut off for a moment and something primitive taken over. He continued to cum, holding his cock tight and twitching his butt. His balls churned. How could he still have this much left -- he'd had sex in the bowling alley less than an hour ago? But then the pressure slackened off. The next pulse hit his forehead, and then his chin, and then just dribbled onto his chest. He let out a sigh and sat quietly.
In the silence, he could hear footsteps coming up the stairs.