Ask, "Do you want to fuck my ass?"

The human chokes and sputters at your question, his face turning red, and he wrenches his gaze away from your show.

"I- I- I'm not gay," he says, but the way he was watching you insinuates something different.

"Are you sure?" you ask. "Not even a little?"

"No. I- I mean, I might have thought about it, but I- I never--"

"Then this the perfect chance to find out," you say. "I'll never tell. You can do anything to me, and it'll be our little secret."

He opens his mouth, like he wants to argue, or decline your offer, but no sound comes out. You take advantage of his uncertainty and drop to your hands and knees, your wings quivering as you sink your fleshy tail deep into your naturally lubricated anus. You moan loudly and raise your ass in the air as you fuck yourself. It feels amazing, but you need more.

"Please," you beg. "I want a cock in my ass. I need a cock in my ass. Fuck me. Fuck me hard. Fuck me now."

Your master throws off his dark cloak, revealing an unimpressive figure in faded jeans and a T-shirt, with an average-sized bulge in the front of his pants. He takes a step toward you, hesitates, then takes another, stepping over the line of salt poured on the ground in a circle. That line is a magic barrier trapping you inside the circle, supposed to protect the summoner from the demon they summon. But it only works if they stay outside of it.

Now that he's inside, you can do anything you want to him. But you have to remember, if he dies, speaks the words of banishing, or if the thread binding you together breaks, you will be sucked back into the void and lost forever.