Mark sat in the waiting room, his leg bouncing nervously. He had an eager energy in his stomach that ran all the way down into his balls. His dick was already growing fat, pressed between his boxer briefs and his thighs.
He had seen the ad online. They were looking for testers for a brand new type of sex toy. A living gel that would respond to the user's wishes. He dismissed it at first, ready to watch a guy get fucked by a hot girl. But then Mark came back to it, the banner pointing up at the video saying, "Wish This Was You?" Yes, targeted ad, he did wish that was him. He had used dildos on himself before, but had always been too embarrassed to ask a partner to peg him. This seemed like the perfect opportunity to make his fantasy a reality.
So after a brief questionnaire about his kinks and a medical waiver, here he was. There were other people, all of them doing their own little nervous fidgets.
A doctor opened a door and called his name. He smiled at Mark in a way that made him blush.
He was led to a typical looking exam room. The kind naughty nurses emptied balls in. A metal box stood on the desk. He stepped closer to get a better look. "Hello, Mark," a voice said. "I'll be your partner today."
"Uh, hi," Mark said.
"I'll be using this to speak to you throughout our session today. You selected a preference for a feminine voice, is that correct?" The voice was coming from several different speakers in the room.
"That's right," he said.
"Very good," the voice said. The metal box clicked open and let out a small hiss. Something green and slick pushed it the rest of the way open. "This is my body," it said.
"Okay, great," he said with a small chuckle. He'd seen art online. Oozey creatures fucking people, tying them up with tentacles and milking them. It was surreal to be about to experience it for himself.
"You will answer me with 'ma'am' going forward. Understood?" the voice asked. The slime rolled over the lip of the box and cascaded down onto the floor.
"Yes," Mark said, his heart beating. The fluid collected into a long strand that snapped as it thwacked against his arm. "Yes ma'am!" he said.
"Take off your clothes," the voice said and Mark obediently kicked off his shoes and hurried to tug his socks off. "Faster!" it said and he rushed to yank his shirt off and shove his pants and underwear down to the ground. His dick bounced as his waistband passed over it, already hard. A little strand of precum stretched between his underwear and the head of his cock.
Mark's breath quickened as the goo slithered along the floor. It touched him and he was surprised to find it was warm, like candle wax. It created a tendril that snaked up his leg hairs and gently grazed the underside of his dick. He let out a long breath.
"Get on the table," the voice said. Mark hopped up and sat on the crinkly paper. The ooze snapped out and left a red welt across his thigh. "On all fours," it said.
"Yes, ma'am!" Mark said. He obeyed, flipping over, resting on his hands and knees.
"Good boy," it said. The slime shot up and landed on his back, spreading its warmth up onto his shoulders and down his spine onto his ass. The goo tangled itself in his hair and pulled his head back. "You want me to peg you, don't you, filthy slut?" it asked.
