One minute Jeff was at home, the next he was butt-naked and being pulled into bed with a strange girl. She was hot, there was no doubt about it, and she was about his age. He was hard just at the sight of her, and the way she was treating him like property turned him on more than anything. She knelt on the bed and held Jeff by the hips, confidently guiding his dick into her vagina. Jeff was still reeling from what was happening and hadn't attempted to make a single move of his own - and he didn't need to. This girl who hadn't even introduced herself - why would she? She only sees Jeff as an object - was confidently guiding him, using him. With a pull on his hips, she thrust Jeff's cock into her waiting pussy. Jeff couldn't help but moan as the soft velvety lips of her pussy wrapped snug around his cock. Jeff wanted to thrust, to hold her and fuck her brains out, but the way she held him, the way she commanded him wordlessly by simply treating him like a sextoy...
She moved his hips for him, thrusting Jeff's erection in and out to her own desired pace. Jeff started to pant as he came close to his climax. She kept thrusting him back and forth, beginning to buck her own hips, even laying back and pulling him along with her. Jeff reached his climax, but found his cock merely bucked in the woman's vagina. He was orgasming but he couldn't ejaculate. He shivered and moaned, unable to release. Her hands slid around and held onto his firm buttocks as she continued to hump him, moaning and grunting. Soon, she came, moaning in orgasm as her juices flowed. She took a moment to come down, holding Jeff close to her. Jeff was still shivering in orgasm, blushing deeply.
After a little while, she lifted Jeff by the hips, his erect penis sliding out, and rolled him to the side. He was left there moaning and squirming, locked in orgasm, as she cleaned herself off and got dressed, acting like he wasn't even there. Desperate for some kind of release, Jeff reached down for his throbbing dick. Something felt wrong. He looked down to see his dick starting to shrink. He could feel it getting smaller in his hands despite it remaining hard. Very hard. It was starting to feel like plastic. A groove was forming in his crotch. For a moment, he panicked, thinking he was changing sex. Then he realised his dick was getting chunkier as well as smaller. His balls seemed to be deflating and merging with his thighs, making it look kind of like he was wearing fleshtone pyjamas. His thighs themselves got a little thicker. With a quivering breath, Jeff sat up to see his cock finish turning into a small cuboid embedded in his crotch. It was hard as plastic, and there was a groove running across his crotch. Curiously, he pushed on his former cock. It slid to the side with an odd click, and his orgasm stopped. With a sigh, he flopped onto his back and started to relax again. His cock was now a switch.
Once his head began to clear, he contemplated on what this meant. He was becoming a dildo, with his whole body. Jeff lightly touched his own chest. It felt more sensitive than before. He stroked down his torso. It felt incredibly sensual - slightly moreso than it would in the afterglow of a normal orgasm. Would his body continue to become more sensitive?
There was a shout from the other side of the girl's door, "Amy, I'm doing laundry."
"Shit," the girl cursed under her breath, "Doesn't anybody knock in this place?"
Amy quickly threw the duvet over Jeff as the door to her room burst open. It'd be so embarrassing if anyone saw her dildo, especially out in the open after she'd clearly used it.
Jeff's first thought at having the covers thrown over him so suddenly was to throw them back off and complain about it. It was practically instinctive, but it could be quite the mistake. He wasn't quite thinking like Amy's Dildo yet, he was still Jeff. He had a split second to decide - suppress the reaction, or to remain still and hide like a good dildo. Would it make a difference? Would the reality shift even hide, from whoever entered the room, the man-sized mass under the bed covers?