Be Rod the rhino's bitch

With a croaky voice, you manage to agree. Rod lowers you to ground whilst softly caressing you. When you head to the registration department, both still stark naked, he lets his left arm linger over you shoulder. Once in a while he slips his index finger in your mouth, making you suck it. After a while you can see your horny stallion pitching a semi, even leaking some precum. Nevertheless his demeanour remains calm and assured - he need not even assert his dominance when passing creatures dare to look in your direction: seeing Rod accompany you makes them avert their eyes in an instant.

Before arriving at the registration desk, he slaps your ass, making you turn around angrily. Your displeasure melts when he moves his left arm forward and starts stroking the side of your face, tracing the shape of your ear with his fingers: "What's your name beautiful?". You answer. "Can I trust you?" Before stumbling into an answer, he places a finger on your lips: "Just nod, ok?" You place your right hand on his left hand, slip your fingers between his, and do so.

He turns you around again and walks behind you as you step to the counter. The clerk behind the desk is unfazed by your and Rod's nudity, seeing as they're used to these situations around here. The woman draws up the papers for you to fill in and sign. The clerk shuffles away, attending some other paperwork in an open backroom.

As you're writing, you feel Rod place his hands on your hips. He is standing directly behind you, with his legs spread, as he rests his head between your neck and your shoulders, looking at your pen scribbling away. Gradually you feel a trembling heat building between your butt cheeks: Rod is parting your ass with the length of his cock. You start blushing, and try to refrain from moaning as he starts humping you. His veiny cock is slippery with precum as he slides it up and down between your ass cheeks. He lifts his head up and grabs your shoulders with both hands as he quickens the pace. His breath his almost searing your neck and his eagerness has made him froth at the mouth and drool, letting spit like lustful lava fall on your spine in long strands, sending shivers over your body.

He cums, whipping your back with smouldering white jizz, and kisses your neck as his dick goes limp, still retaining its length and cola can girth. He crouches slightly and starts licking his seed of your back, moving down to proceed with a thorough rimming of your ass crack, before standing back up and swapping his semen with you in a deep and soulful kiss, making you swallow his load by rubbing your throat.

Amazingly through all of this you managed to complete the form, and the both you are placing the finale signatures as the clerk returns from the backroom. She congratulates you on the union with your animorph and advises you to pick out some clothes in the nearby changing room, as the mild spring weather outside is still a tad too cold for nudists.