"Are you sure you'll be all right, luv?"
Robert sighed. "Yes, mum, I'll be fine. You'll be back tomorrow afternoon, for heaven's sake."
"There's food in the fridge. And Mrs Parkinson is next door if anything happens."
Robert closed his eyes in exasperation. "Oh good grief. What's going to happen? I'll be fine. And anyway Mrs Parkinson is as deaf as a post."
His father was already in the car, fiddling with his keys and looking impatient.
"I don't like leaving you on your own."
"Stop worrying. And just go. Have a good time."
Looking unhappy, she set off down the path to the car. Robert closed the front door, leaned against it, and shook his head. Moments later his eyes lit up and he took the stairs two at a time to his bedroom.
He'd been working on The Project for weeks, and now it was in its final stages. He placed it on his desk, arranged the assorted parts, and examined it critically. He'd managed to find a better piece of tubing at the wine-making shop, and he carefully replaced the old one with it, sealing the joints with glue. While that dried he went downstairs to get a cup of coffee.
It was done. He had the house to himself for twenty-four hours. All that was left now was to try it out. He'd been looking forward to today for a long time.
*
Grimacing, he gently pushed the lubed dildo until the widest part had gone in, at which point his sphincter helped it the rest of the way. His face cleared. That was much better – it wasn't uncomfortable at all. Last time he'd tried it, he'd inflated it too much to start with and it had been more difficult. He checked the new seals, carried everything over to the bed, and lay down, arranging the tubing carefully on the duvet.
Next he took the little black rubber cap and slipped it over the head of his hard cock. The cap had been the most difficult part to get right, but this latest version gripped well and wouldn't come off unless he rolled the edges up and pulled it. The soft rubber protrusions inside carried the vibrations of the small device on the tip directly to the glans, and felt quite wonderful.
He picked up the Arduino (a birthday present from his parents) and checked it. The programming had taken ages, but he was happy that it was all functioning properly, and he'd been delighted that the gas pressure sensor had worked perfectly straight off. Then there had been getting the timing right – that had taken longer (and had involved a few accidental orgasms) – but nine seconds seemed perfect: long enough to let him cool down a frustrating amount before it started again, but short enough to keep him very close.
The Project was finished. So far he'd tried the vibrator and the dildo separately, but he hadn't yet put it all together. At last, it was time to see if the whole thing worked.
He pugged the thin cable from the rubber cap vibrator into the Arduino, and then attached the tube from the dildo. He could feel it enlarging inside him as he pumped it up a bit more. All done. He connected the battery to the little computer, took a deep breath, and turned it on.
Robert closed his eyes as the cap started to vibrate. Oh fuck, that felt good. He'd been hard since he'd first come into the bedroom, and although the device on his cock head had only been working on him for a few seconds, it had already got him close. He felt the first stirrings of impending orgasm – and the vibrator stopped.
He hadn't even noticed the contraction in his arse that had squeezed the dildo slightly, momentarily increasing the air pressure inside it, and so had triggered the computer to switch the vibrator off. That was amazing. He'd wanted to cum, but now that nothing was happening at the end of his cock, the feeling was backing off.
Nine seconds later the vibrator started again. He was still close, so he got back to the edge more quickly – the machine had only made the cap vibrate for a few moments before the pulse from the dildo had switched it off again. And this time it was more intense – the compulsion was so great that it was impossible for him to stop himself from grabbing his cock, and with a couple of strokes he made himself cum. The rubber cap ballooned as his spunk filled it.
Oh fuck! He sighed happily. The timing was spot-on, and the thing was fucking irresistible. Yes!
After disconnecting the battery, he removed the dildo, and took it, together with the rubber cap, into the bathroom for cleaning.
Later, after having a pee, and with another coffee and a slice of cold pizza inside him, he went upstairs again. It had all worked well. In fact it had worked too well: he hadn't had much time to enjoy it before the compulsion to cum had been so overwhelming that he'd had no choice but to finish himself off.
Robert's fantasies involved abduction and interrogation. In his mind, The Project was a cunning, unfair, and sexy torture device that was used by hunky black-uniformed SWAT-types to get information from their captured victims. He fantasised about being worked on by guys like that, and so he really wanted to feel helpless to stop the machine. What he needed was someone to tie him down so he couldn't reach his cock. But he had nobody to do that.
He tapped his teeth with a fingernail, deep in thought. There was the pair of handcuffs that he'd nicked after the school play because he thought they were cool, but he couldn't use them on their own as he didn't have a key for them. He got them out anyway.
Jumping up, he ran down to the garage and searched through cabinets and drawers. Five minutes later he was back with an armful of luggage straps and some thin ropes. After a further ten minutes he'd attached four straps to the corners of the bed. He stood back and looked at them, frowning: there was no way he could strap all four limbs down and still be able to get out of it afterwards.
An idea occurred to him. He repositioned the left-hand wrist strap, making it tighter and the loop much smaller, then closed one side of the handcuffs around it. He'd strap down his feet and his right hand – the one he used for wanking – then just lie with his free left hand on top of the cuff. He'd be able to feel the cold metal, imagine it was holding him, and he'd feel completely restrained. And when he couldn't stand it any longer and was forced to make himself cum, he'd only be able to do it with his left hand. That would have to do; it was as close to feeling fully restrained as he'd be able to get.
After securing his ankles tightly, he secured the strap over his right hand, pushing it sideways so that the buckle would be out of the reach of his fingers, and then he switched the machine on. And gasped: the buzzing of the vibrator – together with the feeling of the dildo in his arse – was amazing. He lay back and placed his left arm on the cold metal of the open handcuff.
He was already getting very close to the edge, and had to use all his willpower to stop himself from grabbing his cock, but then the vibrator stopped. Oh shit, he thought, this felt so fucking horny. He closed his eyes and pulled at the restraints, imagining that he was being interrogated by hunky SWAT guys. In Robert's mind a man was looking down at him through a black balaclava, a sadistic smile under his mask.
Tell us what we want to know and we'll let you cum.
"I won't tell you. Do your worst!"
Right on cue, the rubber cap began to vibrate again.
Struggle as much as you like – you're helpless. You're strapped down. We can do this to you all night. You will break.
"I will not!"
Robert was more horny than he'd been for a very long time. He squirmed and writhed on the bed as the vibrator got him closer and closer to orgasm. Then it stopped, leaving him on the edge. His left hand had got halfway to his cock before he'd managed to stop it. No, he told himself, you can't reach your cock. The SWAT guys had restrained him specifically so that he couldn't. They were using a fiendish device on him that would – mindlessly, tirelessly, and repeatedly – get him to the very edge, and then stop whenever he was just about to cum. And it would keep doing it until the SWAT guys turned it off.
The very thought of that made him need to cum so badly.
A few seconds later the rubber cap started to buzz again. He moved on the bed, stretching, pulling at he restraints.
Oh fuck he needed to cum! But he would fight it!
His left hand slid over the metal handcuff.
If he'd consciously tried to do it, he'd never have been able to – and yet, of course, it was inevitable. As his wrist moved over the open handcuff, it pressed it into the bed, where the bottom of it stuck just enough for his movement to roll it. That on its own would probably not have been enough, but he was still struggling, and a sharp jerk downward at that moment did it. The cuff closed and engaged, just on the first tooth.
Robert felt it happen. Immediately he tried to pull his hand out – his wrists were small, so if he'd been very careful he may even have managed it – but he wasn't careful. The ratchet closed the rest of the way, trapping his wrist properly.
He lay on the bed, staring in panic at the ceiling. Nobody was going to find him until tomorrow afternoon. And then it would be his parents.
And the batteries in the Arduino and the vibrator were brand-new.
Nine seconds later the rubber cap on the head of his cock started to buzz again.
Just before he could cum, it stopped.
Oh shit.