Have some fun and fuck him with your tail

He's ready to blow, but you slow your contractions, teasing him with agonizingly slow strokes, making him groan in frustration. He wants this so bad. But you're not finished having your fun.

"Spread your legs," you tell him, a devious smile teasing your lips.

"What? Why?" he gasps, then he yelps as you give his cock a particularly hard squeeze. "Okay, okay!" He moves his legs apart.

"Good master," you purr, relaxing your grip. "Now bend you knees. Put your feet flat on the ground." This time, he obeys without question. He's a fast learner. You lean back against his thighs and curl your short, fleshy tail downward, sliding the tip through the thick fluid that has leaked from your pussy. Your tail rubs along his balls, caressing the heavy globes and making him squirm. "Hold still," you remind him, and he moans, the sound almost a sob.

"Please..." he begs. "Please let me cum."

"Soon," you promise, but he doesn't see your wicked grin. The slick tip of your tail slips between his ass cheeks, finds his tight pucker, and slides inside. The tip of your tail is hardly thicker than a big man's thumb and has no trouble penetrating him. He gasps, the shocked look on his face making you laugh, but he doesn't look like it hurts.

"Wh- what are you doing?" he asks, his hole clenching around your tail.

"You said you weren't gay," you tell him, slowly thrusting your tail in and out of his ass, stretching the muscular ring and spreading your pussy juice deeper. "I'm not sure I believe you. I think a little ass-fucking is all it'll take to make you cum. You want it, don't you?" You push deeper, curling your tail to rub against his prostate. He makes a strangled sound, his face turning red again, his shame evident. Scenting blood, you move in for the kill. "Your ass feels so hungry for a good fucking. Makes me wish I had a cock. I'd fuck you for hours, and you'd love it, wouldn't you? You like being fucked in the ass, just admit it. I won't tell anyone."

You tighten your pussy snugly around his cock, holding him in a sheath of hot, wet flesh, but you keep your inner walls still, not stroking, not sucking. The only stimulation you give him is that of your tail sinking deeper into his ass, rubbing, grinding, stroking over his prostate. He shakes, gasping for breath, his eyes squeezed shut, his brow damp with sweat as he fights the impending orgasm.

Thrusting your tail as deep as it will reach, you bury a good five inches of warm, squirming flesh in his back passage, pull halfway out, and thrust back in again, each stroke pressing against that sensitive ball of nerves, each thrust harder and faster than the last, until you're pounding his ass with your tail, fucking him like a jackhammer.

Suddenly, his back arches, a wordless shout ripping from his throat as his cock pulses inside of you, flooding your tight channel with his thick cream. His hips jerk, his breath coming ragged gasps as wave after wave of intense, shuddering pleasure rolls through his body. You enhance each wave with an accompanying squeeze of your inner walls, milking the cum from him until not a drop is left.

A heady rush of sexual energy floods through you, starting in your pussy and racing out to your fingers and toes. You feel stronger, more powerful and resilient. Even your tits look a little bigger.

He collapses, gasping for breath, his whole body trembling with the aftershocks of his orgasm. Just for the fun of it, you give his overly-sensitive cock a few more slow, firm strokes, making him squirm and whimper beneath you. Too soon, though, he's gotten soft and he slips out of your tight box, leaving you empty and aching. Withdrawing your tail, you climb off of him and sit back, sinking your fingers into your wet snatch and rubbing your throbbing clit as you regard the dazed and gasping human before you.

Such fragile things, so easily worn out. It'll be an hour before he's 'up' to fucking again. Well, maybe a half hour. He's young. But still, it means waiting, and you hate waiting. You feel the power surging through you, and you want more. With this power, you can change your body to make you more effective at pleasing your partner. Bigger tits, longer tongue, a more dexterous tail...your predecessors have tried them all, and you smile at their memories, the successes and the failures. Then a memory really catches your interest, about chemically altering your body to produce pheromones that increase the human libido, making them horny and virtually insatiable, capable of fucking for hours and cumming repeatedly. Sounds like exactly what you need.

But to do that, you'll need more energy.