You feel the feral instincts of your changing species take over as you think about your buddy Matt back home. His dark, Mediterranean features, his warmth....you can't take it any more. Eventually, your stroking leads you to a massive orgasm and a stream of yellow cum exits your changed cock. You feel the urge to eat it, so hungry are you, but you stop yourself, not giving in totally.
"Holy shit, I'm a fucking monster now", you intone. "I need to leave here and get back to the mainland". You call the prison guard over to you. "You ready to fuck now Man-Ogre?"
"Yes, give me your cock." He takes you outside of the cage and bends you over to fuck. You let him ride you willingly, but you also eye the exit. You can't help but feel how insanely natural all of this is, but you are still a human too. Just as he is about to cum, you kick him. He cums in you right as you get off of his dick and run away, through the maze of tunnels. Something about your sense of smell allows you to know which way the exit is. You run outside into the woods of the island and begin making your way to the ferry.
You begin to feel warm though, and realize that he did cum in you. Doubling over in pain, you feel your brow grow heavy and, for the first time, your ears come to points. You begin growling as you feel your skin become more of a tough hide. "Shit, how am I going to pass when I get to the mainland?", you say. You already feel hard again. You decide to stroke your needing cock right there, growling in the way of your new half-species.
After satisfying yourself, you make your way to the ferry, find a cloth, and sneak on board. You make your way below deck and hear the ship set sail back to the mainland. The journey isn't too long, but you begin to feel strange during it. Your body...is changing back.