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It had been a long time since Ernest had been so involved in a physics project. But, that was just the problem: They'd become physics projects. What had been a passion for his entire life was now part of his major. Blueprinting, designing, and number crunching all related to his future, prospective career. What room was there to build structures and devices for fun?

That is, until he had the idea to build an extremely glorified sex bench. Even then, it had just been an idea. A neat daydream to help pass the time. It wasn't until he'd let his lanky friend Finn in that the project became very much a fact of his life.

"Do it." Finn said. It was somewhere between a statement and a command. It was spoken in the tone of an excited kid who only just realized that something extremely awesome was possible in this beautiful world.

"Really?"

"Yeah. I'll test it out."

Ernest very nearly replied, but had to take a moment to view the overpowering scene that gave him. Finn was a very sexually liberated creature - but he wasn't an insensitive deviant by any means. He and Ernest hadn't ever done anything together, they hadn't seen each other naked, because being gay was way more than just having sex and fooling around with anyone and everyone. Finn was in a relationship, and apparently was far less of a general wreck than ever before in his life. And Ernest loved having crazy monkey sex as much as the next guy. He and his mate made a habit of fucking in the woods on the regular, in fact. It was a favorite pastime of his, and for the both of them.

But Finn had never been even a bit of a prospect. First, his body type was all wrong. It was stereotypical to say, but if one looked up the definition of lanky in the dictionary, Finn is the creature who popped up. He had landed the perfect mate, because Beef was just about the only person Ernest had ever seen who was actually taller than the towering, lanky Finn. His limbs were proportioned well to his height, but they still looked just a little too long. And he had that thing where his hands looked a little bigger than they should have been, just because lumpy ends to an otherwise generally gangling man. It was like he was a teen who had had a freak growth spurt in high school. Although some of the rest of Finn hadn't ever quite caught up.

That was all Ernest had seen of Finn, and all he'd expected to. But when the panther offered to "test it out", it just brought to mind a naked, toned body, with fur almost stark black save for slightly darker rosettes all through his fur. Ernest wondered what color and patterning his friend's package had. Was it also black? Did he have rosettes on his balls? Then Ernest cleared the picture from his head, although it lingered something fierce.

"Uhm." Ernest eventually said. He wasn't typically at a loss for words. But Finn was odd. Sometimes you just never quite knew what to say in response.

"Can I test it out?" He was eager again, and only then did Ernest notice the panther's tail. It was thwipping madly in excitement. How quickly his friend had gone from zero to one-hundred, and possibly beyond.

"Uh. Sure."

"You mean it?"

"... yeah."

"No, I mean, really. Not just for me, but you'll do it? I don't want to look forward to it if it's not going to happen."

"It'll happen."

"How can I be sure?"

"Uh, because it's me? Come on, Finn, you know me. I love a good project, and I haven't had one for a while."

"Awesome. I'll help however I can."

"I don't think there's a lot you'd be able to do, no offense. But I appreciate the support."

"Then that's what I'll do. Emotional support. And you can measure me, if you need. You probably do need a test subject, after all."

There was that mental image of naked, lanky Finn. Probably Ernest's projection was off, though. Sure, he had probably jacked off to porn involving panthers at some point or other. But he hadn't ever specifically paid all that much attention. Besides, he used to date Courage, and they were BFF's to the moon and beyond. It was oddly impossible to picture Finn naked or in a sexually compromised position. Such as being locked inside of a pasiphae structure. It was an impossible thing to imagine. Yet, there the picture was.

And the picture lingered on and off, both due to Finn's insistence and general encouragement towards the project - but also by the sheer nature of the project itself. To Ernest's knowledge, no proper pasiphae structure actually existed. He couldn't find references for such a thing online, and he had tried. But he had found it in a few select comics online, or other drawings. The idea was sound, not only because of the bondage aspect - but just because of the engineering involved. Could you make such a thing comfortable for extended periods of use? How sturdy would it need to be, to stand up to men of all body builds ramming their full weight in and out of it? What would adequate breathing provisions look like? How much carbon dioxide was offset by how many air holes, and how far away from them could you be?

Funny thing was, Ernest was perhaps more aroused by the math involved than he was by the glorified sex bench itself. In perhaps a similar way, his friend was equally into it, and also not strictly because of the inherent sexual elements. Pasiphae was, of course, an element of mythology. She gave birth to the minotaur, because she had been impregnated by a bull after stepping into a hollowed out cow designed specifically for sex. Hence the term pasiphae structure. It was a more aptly named device than saying something like, "A sex bench with a full enclosure and straps so you can fuck someone but you don't know who it is". And Finn was a linguist, through and through. He liked the poetry of the name, and the envisioning of an element of literary history. Plus, bondage bench. What wasn't there to love?

It's just that, it seemed nobody had done it before. That's what made the challenge all the more real and engaging. Ernest was heading into civil engineering. He had grown tired of drawing buildings and landscapes. Designing a pasiphae structure was something altogether new and exciting. It was also the first thing he and Finn had properly done together, which had been unexpected, nice, and a long time in the coming. They'd been dorm mates for a few years now. Or at least, their solo dorms were on the same floor. And Ernest had started to date Finn's best friend, even if that description was woefully inadequate. They were brothers-from-another-mother in a way, but even that didn't do enough to describe the bond they had. It was just, something in their nature - these two fellas would be together until the end of time, even if romantically things hadn't worked out that way. And since Earnest was with Courage, that meant Earnest was in a way with Finn as well.

Maybe it was easiest to describe him as a brother in law, even if Ernest didn't feel quite that serious about his mate just yet. But for being brothers in law, and for living on the same floor, the two of them just didn't interact all that much. So it was cool to have Finn over so much during the designing and construction of the bench. Finn had taken to calling it a bench, even though he agreed the full term "pasiphae structure" had a poetry about it. But still, the stubborn cat refused to call it what it was. That kept it a bench, and perhaps for the better. Projects with complicated names tended to do the worst in the engineering/architecture world. It was a well understood and unspoken rule. It turned out to be true more often than not.

And Finn's presence and input turned out not to me as distracting (or annoying) and Ernest thought it might be. He wasn't altogether sure where he got that impression from, that Finn would be annoying. He just had an excited energy, like he was interested and excited to be alive all of the time. And where did someone even get that sort of energy, let along the audacity to express it? But outside of being excited about ideas, he was actually pretty chill. They talked a lot about their boyfriends, but they also talked about music and books and their pasts. They discussed philosophy and the way of things, as surely as Ernest was deciding on what type of wood to use, and what manners of joints would hold up the best. Unfortunately it would not be a cheap project, especially if it was going to stand up against Beef. Thing might as well have been made of steel and still Ernest would be unsure of himself.

That made the task all the more challenging. If he didn't make this thing absolutely as sound as humanly possible, then it was actually just going to be destroyed on its pilot excursion. That was a lot of money down the drain. So spending even more money on the stronger materials was the right move to make, even if it wasn't an easy choice. But still, progress on the bench was sure. Over the course of a few weeks it had started to take over Ernest's room. Then the day came. The piles of organized, precision cut wood faded away, as did the well organized bags of assorted screws and bolts. And in its place was a beautiful, fresh, and ideally functional pasiphae structure. Or, bench, for the laypanther standing witness to the whole thing. But, he wasn't only here as a witness. He was here as a test subject as well.

Ernest had measured for his own torso and shoulders, as he was more broad than Finn, and gave the diameter some slight clearance above even that. But Finn's height was accounted for exactly. It was doubtful to find any bottom much taller any time soon, and it's not like this bench would be making any particular sort of rounds. At most it would be a community bench for their friends, and most assuredly no bottoms among them came close to Finn's proportions. But, while nobody would be tall as Finn, by the same turn everyone would be shorter. That was just one of the many engineering feats involved in this intricate device.

It had adjustments in the legs to raise a platform to stand on. There were straps all along the legs and main chamber, to keep a person well secured. It wasn't just for bondage, that was actually a side-effect. But there couldn't be an exact padding and inner dimension as to fit just one person. That'd be an awfully specialty device, and if Ernest was going through this whole business of making the silly thing to begin with, he'd be damned if he didn't get a chance to use it. So the straps kept the person safe and intact, even while they were being furiously plowed into via the device in which they were contained.

As for the device, it was unpainted and undecorated, more proof of concept than anything else. After all, what if you painted something which turned out not to work? It was part of why no mates had been involved in the project. Ernest didn't want his mate involved and present during a trial run. Nor did he want someone to judge his handiwork, as Courage was a bit of a handyman himself. Similarly, Finn's boyfriend was more sex-hound than handyman, and would most surely get in the way. So it stayed Ernest and Finn all the while. Similarly, during this testing run, it was Ernest and Finn. But they hadn't exactly thought that reality through.

There were a lot of problems. The straps were strong, the measurements were sound, the engineering was all there. This was a solid piece. This could stand up to the test of time, even to the test of massive bulls ramming into it with all their might. It was a thing of beauty, and Ernest was damned proud in his work. There had hardly been a hitch in the whole thing. From design to implementation, every screw lined up, every joint was perfectly secure. Even if he'd been focusing more on drafting than actually working with wood, he still had it.

But, he wanted to have it from start to finish. This glorified, over-engineered sex bench was his baby, and he wouldn't have anyone abusing it before he was sure in his work. But it had to be tested and fitted, especially the engineering which aligned bench hole to tail hole. The bench meant nothing if there wasn't a person inside it. But how did it fit, was it comfortable, was it even practical for actual use?

The only person he'd have trusted with helping out was Courage. He and Finn had had a history, and Ernest knew the stocky cougar could treat the device with respect. But Ernest was a little uncomfortable with them playing together, even under his supervision. Plus, he was a little concerned that his mate would be judgey, even though they'd certainly be using this bench themselves. And Finn's mate was completely out. Yes, Beef would have to have his way with this bench as the ultimate stress test. But there was a high likelihood that the bench would fail that test. Which meant that Ernest had to say goodbye first. But then, he hadn't even said hello.

In all, he needed to invite Courage over after all. Because the time had come to put Finn in the thing to try it out. And if Courage couldn't come to take advantage of the thing, then Ernest would have to. And that caused an unexpected flutter.

"We should call Courage." Ernest said.

"Okay."

Ernest had hoped Finn would be a little more helpful than that.

"It's just that-"

"I know."

"Yeah, but-"

"Really, it's okay. I wouldn't trust it either."

"It's nothing personal."

"For sure. I take it you're not comfortable?"

"With what?"

"Testing it with me. That's fine. I thought Courage was part of the plan already."

"Oh. You did?"

"Sure. We're both bottoms, and we haven't fooled around. Although we could."

That gave Ernest a pause.

"Courage has offered, and Beef is loose, and I think it'd be fun. But we're both bottoms, and I get that it could be weird anyway. But just so you know, I'm open to the idea. I think it'd be fun."

"You do?"

"Sure thing. Sex is rad. But do what you need, and don't let me pressure you! I'm just excited to try this out, is all. Your call."

That made it honestly Ernest's call. For a moment he was torn. It would be nice to have Courage over to handle the sexual part of their work. But then, how much of that was Ernest's reservations making things more difficult than they needed to be? If it was a stress test then he could treat it that way. Finn had bought several dildos, so it could practically be clinical. Never mind the fact that Ernest would be using them on a friend, and effectively on his mate's brother. But it would be an element of engineering, rather than an element of sex. That helped make his choice easier, but more than that it had to do with his word. He'd told Courage that they'd handle it on their own. He wanted to test the bench on their own, and Courage had been a little surprised but gave his okay, and even seemed into the idea. And Ernest hated to go back on his word.

"We'll do it on our own." Ernest said after giving it proper consideration.

"Cool." Finn said. Then he blessedly took the lead and started to strip.

For just a moment Ernest wanted to protest or be surprised. But he kept himself in a mode of supervision, or of construction. They were here to test the bench, to measure its properties and see what it could handle. They were not here to have sex with Finn. It was perhaps a side-effect, but entirely beside the point. So it was easy not to sexualize the panther as he stripped in Ernest's dorm. Although it was impossible not to take in his naked form at least a bit. The panther was toned, and his proportions somehow made sense when you saw him in the nude. And the darker rosettes which dotted along his already dark fur seemed to highlight it all. To Ernest he was unexpectedly gorgeous. But the moment was short because they had business to attend to. And when Ernest had a task at hand he tended to get pretty focused on it.

"Let's do it, then." Ernest said.

"Sure thing. How do we start?"

"Step in here, first of all." Ernest said, motioning to either of the legs. Then they set about the task of getting Finn in position, and strapped in, and vulnerable and exposed. He was becoming an extension of the sex bench. Before long he would be less of a panther, and more of a piece of furniture, to be used and abused, in all the right ways.

That said, it was a good thing Ernest was here to guide the process. For all the engineering involved, and the safety measures and construction, and by nature of the sex device itself - this was a complicated affair. You strapped either leg in after adjusting the leg stands to position your rear at the appropriate height. For Finn, of course, on whom the device was modeled, this point was perfectly moot. Then either leg had a back which swiveled closed. It had two latches on top and bottom to keep it secure, and the pieces were cut precisely indeed. It was hard to tell there was a seam at all, and the hinges were both sturdy and small. The effect was that you might not have known it was hollow at all, which was of course the point.

The biggest test would be to see how flawless the body itself looked. It was important to Ernest that it was at least somewhat ergonomic. Placing a few handles had been a hard design choice, in part because it was guesswork more than anything. A lot of body types could, in theory, end up topping the sex bench. So if you had handles to aid in the fucking then where on earth would you put them? And how could you do that without making the whole thing look like an odd mess? Ernest did the best he could, but before that there was one more particular element to the device which was more important to test than any of the others.

He had poured over and over the anal ring which secured the sex bench to its inner participant. He'd hand chosen the materials, debated over the ring diameter with himself to the ends of the earth, and made prototype after prototype for the air bladder and construction. The material was the texture of a fleshlight, but he needed it to be able to expand with relative ease, and it needed to be short. Otherwise the effect would be one of fucking into a fleshlight attached to a bulky bench. It was important that the person inside was getting as much dick as possible - otherwise the project was for vanity rather than purpose.

So it was a particularly short device. Its primary purpose was to tie the subject's rear to the base of the bench as closely and tightly as possible, to ensure maximum penetration. That was the biggest design challenge. Without anchoring the person well, then the bench would be harder to use. If you had to aim your dick to the person's tail hole, through a hole in the bench - that was a lot of margin for error. And the person inside needed to be strapped in for safety, security, and purposes of sex. So they couldn't very well help in the aiming process, could they? To Ernest, it was important that if he was making the thing, that he wanted to make it right. So it needed to be as user friendly as could possibly be.

Hence the anchor. He was proud of it, and eager to see if it worked. A part of him was also rather shy, because this was when it got unabashedly, unarguably sexy. But the mechanical part of his mind won out. He just hoped that Finn would be on board.

"So, now for the anchor." Ernest said.

"You don't close it first? What's the anchor?" Finn asked the first question, then realized that the second would be much more pertinent to ask. Ernest hadn't said anything about an anchor. So he explained it in detail, and Finn got more excited than Ernest could possibly have known.

The end was loose, with a solid, rubbery end. It was attached to a small hand-pump on the inside of the bench. It inflated a ring inside the participant, big enough for a cock to slip through with ease, and big enough that it couldn't be easily pushed out at all.

"Seriously?" Finn asked.

"Yeah. I needed a way to anchor the person inside, and this is what I came up with."

"It's brilliant!" Finn said. He twisted himself around awkwardly to try and get a look at it. But he was strapped into the legs pretty well, so all he achieved was to look odd and extremely contortionist. But he couldn't get a particularly good look. Ernest, however, had prototypes galore. He pulled one out.

"This is it." He said. "More or less. The actual model is a little more wide-"

"Pump it up!" Finn said. Ernest did, and Finn's eyes got wide as the ring got bigger. He could easily imagine it inside.

"How big is it?" Finn asked.

"This one is about three inches. The final one I used is closer to four."

"Four?"

"I'm aware that's a lot."

"Sounds fun to me, and not too big."

At this Ernest raised an eyebrow. He held up the model, with a three inch diameter, and measured out an extra one with his knuckle. "It's that big."

"I know."

"Oh." Ernest said. He had expected to encounter some resistance at the idea. Then he remembered that Finn was, apparently, legendarily sexual. Ernest could see now that he had earned that reputation, apparently for good reason.

"Are you accounting for a knot?" Finn asked.

"Well, maybe. Or a fist or something."

"You think you could fist that?" Finn said. He was eyeing the four inches shadow curiously.

"Sure," Ernest said. "At least, probably. How wide do you think a fist is?"

"Hadn't thought about it." Finn asked. "But what if it breaks?"

"It isn't a tight enough material to blow up or anything. It would just tear and deflate is all, and I'd have to make a new one."

"So don't tear it."

"Beef probably can't fist you." Ernest pointed out.

"Point taken. I just think it's interesting you thought of fists at all. How did you think this was going to be used?"

"I don't know, Finn. I just decided on four. Wasn't sure how big that was."

"But you're a bottom."

"But I don't put four inches thick things inside me. That's your wheelhouse."

"I can do way more than four." Finn said with a big grin of pride.

"Okay. Well, I'm happy for you. Actually I am, that's a pretty big feat. But not one I was hoping to imagine."

"You brought it up."

"I guess I did. Anyway. The ring will secure you to the bench, and it's a short tether so you won't be able to really squirm away. And there's enough slack here that your sphincter won't be unnaturally held open."

"So they're fucking into me as much as possible, and it feels as natural as possible as well."

"Exactly."

"Let me feel that." Finn said, and he took the prototype in his hand.

It had a fleshy enough feel to it, but was more smooth than anything. Maybe it was something between leather and silk? It was hard to describe. At any rate, Finn was experienced with anal sex. Most likely he was the most experienced of any of their friends (and they had some awfully frisky friends). He knew so much of anal sensation was the tightness of the sphincter. It was an important design element to keep that part as natural as could be. And since anal sex should use plenty of lube anyway, the clear gliding sensation shouldn't be too different, although hopefully it felt a bit more like skin than it did fabric. The big thing was that it was a thin fabric. In theory everyone should get as much sensation as they could.

"Looks good to me." Finn said ultimately, handing the device back.

"Good. And I'm glad four inches seems fine to you."

"Hopefully." Finn said with a shrug. "One way to find out how comfortable it is."

Then Finn leaned over, and rested himself against the base of the bench. As envisioned, it lined up perfectly. It felt just like leaning over the edge of the bed. Finn's legs were splayed wide, his rear was open - and the position really was a comfortable one. What more, it was unexpectedly sexy. Then again, Ernest wasn't entirely sure what he had expected. It was a naked person getting into position to be locked inside of his pasiphae bench. It didn't get much more sexual then that.

"So, uh. Here we go." Ernest said. He knelt down to Finn's rear, and the rear of his bench, and took the nub of an opening in hand. He lubed it plenty, although it was altogether a small protrusion and shouldn't have needed nearly the amount of lube he applied. Even as he worked he could hardly imagine he was seriously doing what he was. This was the final ticket. He was about to insert something anally into his mate's best friend. Then he would inflate the end of it, to secure Finn's hole to the base of his bench. Then the panther would be fully available to use, and effectively powerless to stop it. Especially once the rest of him got strapped in. And it would be impossible to miss the panther's rear, because the entrance to the bench would perfectly meet the entrance to Finn's hole-

And then it was.

The process was smooth. Finn scooched back onto the nub. Ernest made sure it was inserted as much as possible. With a few pumps he knew the ring was expanding, but there wasn't much indication from the device itself. It looked the same as ever, if it was visible at all. Mainly it just looked like Finn was holding himself up perfectly against the base of the glorified bench.

"How is it?" Ernest asked timidly. This was the only real element which could go wrong. The rest of his construction and engineering was sound. But if this didn't work out-

"Feels fine." Finn said. His tone was nowhere near as sexual as the situation might have warranted. Like he was treating the experiment with the serious attitude Ernest was trying to bring. It was an appreciated gesture.

"But, how, specifically?"

"Hard to say. Like there's a large ring inside my sphincter. Feels just like a buttplug, basically. Hard to tell that it's hollow."

"Is it uncomfortable?" Ernest asked.

"Let me see." Finn shook his rear around as much as he could. He experimentally tightened his hole at the base of the ring. "A little? It's definitely impossible not to notice. But it only hurts if you bear down on it. You'd get used to it after a while. You chose well."

That filled Ernest with a huge measure of pride. As with all creatures, he loved to be acknowledged and praised. But it wasn't just him - it was his structure, his little quirk of engineering. It was all going according to plan. Then, of course, was the rest of the plan. Finn still needed to be strapped and locked in.

His thighs came next. It was an extra measure to keep his rear as tight against the base of the bench as possible. The anal ring was more for ease of access and convenience than anything else - it was the straps which did the bulk of the work. And the engineering was sound. The bench wouldn't work for a fat person at all. But for someone of a fairly standard build (or a thin one like Finn), it was a near perfect fit. Just by leaning over his rear was already nearly perfectly lined up to the base of the bench. It was a small thing to adjust him into perfect position. From there it was a matter of strapping down the rest of Finn's body.

Finn's arms were bound straight down against his body. Probably it wouldn't be the most comfortable of positions for long term use, but it kept the arms out of the way, and helped the bench keep a slight profile. With a few fairly tight straps (padded for comfort), Finn was immovable and perfectly sure. For his head was a comfortable, adjusted cushion. It had been one of the more challenging pieces to design. In the end, it wasn't too much unlike the headrest on a massage table. There was room for his muzzle, with a large mesh screen for oxygen aplenty. In all it was a fairly comfortable headrest. Finn hardly minded at all that he was strapped into it, and unable to move his head at all.

"For effect," Ernest said as he finished strapped Finn in, "you could have a ball gag in. That'd heighten the experience all the more. But for our purposes today we don't need one."

"I did bring one." Finn added helpfully.

"I doubt we'll need it. But noted." Ernest said it dismissively, although the idea did linger to him. It was another element to the bench to test, after all. Would the subject still be able to breath comfortably if his mouth was sealed shut?

But the work continued. Ernest asked Finn if he was okay. The panther said yes. Then Ernest closed the lid to the bench, and closed all five of the binding, tightening clasps. The effect was exactly as intended. It came across better than Ernest could have hoped. The bench looked natural and solid, and the seam was hardly noticeable at all. Standing in his living room was an odd piece of furniture. If you knew it was for sex then obviously that's what it was. But it looked almost more like a standalone smoker or something. It was a cylinder on four legs. Ernest remarked that he could decorate it the right way, or even redesign a few elements, and it could be disguised as a perfectly natural grill. You could set a person outside at a party, secretly bound, and nobody would know. You could either have strangers over and make a secret game of knowing that your mate was tied up inside a sex bench, hidden perfectly in plain sight. Else it could be a party of deviants. Though the only odd thing about the scene at all would be the occasional fellow fucking into the side of a grill. Other than that, an onlooker might never know anything was amiss.

Already the project was a tremendous success. Seeing it in action, even complete, started to get Ernest riled up. It was hard to say what it was that aroused him more. The bench itself was a really sexy idea, and it was being realized - it was in practice even now. But also was the general elation from a project being completed. It felt great when something worked out on the first try. And boy was this working out.

Then the spell unexpectedly broke when Finn spoke from inside the furniture-with-a-hole.

"So what now?" He asked. It made Ernest frown for a second. For just a moment he had forgotten that his friend was bound up inside of it. He had just been basking in the glory of a project well done.

"Well," Ernest began. He had to fetch through the corners of his mind for the rest of the plan. Finn was in place alright. Now they just had to test out the sexual mechanism of the bench to see how well it worked. "I guess we test it."

"Guess so." Finn said. Then, after a moment, "Can you tell I'm wiggling?"

"Not even a little?"

"Thought so. I can't wiggle all that much. What about now?"

"Yeah. Stop rocking, it breaks the illusion."

"Stress test, remember. What about-"

"Finn!" Ernest rushed to the bench and steadied it.

"Then you'll have to secure that."

"Guess so. Hadn't thought about the person inside deciding not to comply."

"Just troubleshooting it. Anchor it to the ground?"

"Maybe, but probably not. I'd like it to be more portable than that. Probably I can strap you in a little bit more, but-"

"These are definitely too loose."

"Really? Why didn't you say anything?"

Inside the structure Finn tried to shrug. But while his bindings were a little loose, they were still secure enough that he couldn't quite pull it off.

"It's your bench."

"But you're the expert here. Come on, you're supposed to help me test this thing."

"Right, you're right. Sorry. Open me up and get me more tight, then. And seriously, it's bondage for a reason. Get those straps good and tight. If I don't feel like an extension of this bench then something's gone wrong."

Ernest followed Finn's lead, then. Sure Ernest had participated in bondage with his mate plenty of times. But it was more for the scene than it was extreme. And he and Courage played with rope just enough to prevent a person's escape. Complete, full body bondage wasn't totally their thing. But apparently Finn was practiced in it. Then, with the panther's guidance and expertise, he was well and truly secured.

"Try now." Ernest said after he'd closed the bench back up.

"Nothing."

"Not at all?"

"Oh yeah. I can hardly move a muscle in here, let alone rock the boat. You did a great job on this."

"Thanks Finn."

"You're welcome. I am totally helpless in this thing."

"That's the idea."

"Yup." Finn agreed, flatly. Then he was silent. Then he said, "You gonna fuck me?"

The moment had come.

"I, uh. I guess."

"Stress test. Don't chicken out now, I'm strapped inside of your sex bench. There's an anal ring inside my-"

"Okay, I get it. Give me a sec."

"Sure thing. Sorry to be demanding, I'm just excited is all."

"I get it dude, you're good. Thanks for keeping me on track, sorry I'm a little nervous."

"It's fine dude. Want me to coach you through it?"

"I should be okay."

"Alright. But if that's easier just let me know. Go slow."

"I know, I got it."

"Sure thing."

By that point Ernest had a dildo in hand. It was the smallest of Finn's collection. It had the most boring shape - a phallic cylinder, not even dick shaped at all. It was the perfect first test. Then Ernest paused with an idea.

"Uh, Finn?"

"What's up?"

"Try and stay silent, if you can."

Finn chuckled inside his lockdown. "Sure thing. I might moan a bit, but I can hold that in if it helps."

"Thanks. Sorry, it's just-"

"I get it man. If that makes it easier than I'm all for it. The bench is your baby, right? So we'll do it your way. Just remember that there's a person in here."

"I will." Ernest said. Then he added, almost as an afterthought, "Let me know if it's too much."

"Please, I'm a pro. But I'll let you know for sure. I'll shut up now. Do your thing."

A jolt of electricity shot through Ernest as Finn stayed true to his word. Suddenly Ernest was quite aware of the radio silence in his room. He couldn't make out breathing or anything. It was just him, and only him - in his room, holding a dildo near the back of his new sex bench he'd just built. There was still an unmistakably sexy atmosphere about the whole thing, because part of him couldn't forget at all that his friend was in there. But at the same time, his friend wasn't in his room at all. It was a strange war of worlds, to say the least. But there was nothing for it. It was time to test this baby out.

Earnest got up close and inspected the rear of his device. It was curved out just enough. It was designed to naturally match the male form (or a female's form, he supposed). As either cheek rounded out it served to fill the natural curve of the device in just the right way. That was part of what helped secure their tail hole directly against the hole in the bench. Then Ernest inspected the hole itself.

He hadn't made it altogether that conspicuous. You might miss it on a casual glance, and it could be downright hidden if the bench was painted the right way. But how comfortable was it to use? It was a question for another time, because to address it more fully was to actually have sex with his friend, who had a boyfriend (although they were open), to say nothing of his best friend status to Ernest's mate. Ernest was definitely the most sexually reserved of them all, and while he didn't want to be a stick in the mud, he didn't want to do anything he wasn't comfortable with. Heck, even fucking his brother in law with a dildo felt like too much.

But then, it wasn't his brother in law. It was his bench.

Ernest held that in mind. He didn't use the dildo at first. Instead he experimentally fingered at the hole of his bench. He tested how much lube it needed, and how it felt, and how tight the entrance was. It was easier to call it an entrance than a ring, or a sphincter, or a panther or a friend.

The entrance was perfectly tight, It took a little pressure to get in. Ernest listened for any sort of gasp of pain, but not so much as a sharp inhalation came from the front end of his bench. Still, Ernest applied more lube and came at it again. He did wonder how it felt on the inside, and it was feedback he needed. So while he was fingering his bench he decided to break his small spell, and he asked Finn how it felt. But Ernest did his best to keep his scientific frame of mind. He wasn't asking his friend inside of his sex bench how it felt to be fingered through the bench's anchor. Rather, it felt like Ernest was asking the bench itself.

"Feels fine, really." The bench said.

"Does it grab?"

"Only a little. I'd use more lubricant on the device next time. What base of lube was it?"

"Water based."

"Silicone next time, for sure. And plenty of it. But it feels fine, keep doing what you're doing."

"Will do."

Ernest kept his tone official and pointed. With those two words he dismissed the bench from conversation, and it fell dutifully silent. Then it was just a bench again, and Ernest could resume his work. He worked three fingers into the bench and figured that was enough prep. But he wasn't just prepping the bench. Mainly he was testing the material of his anchor device. How did it feel, and how readily did it stretch? He pushed in and gauged how the anchor ring felt. How far into the bench did it reach, and how wide was it in the first place?

It felt a little bit odd. If he didn't know what he was reaching into he'd have been a good bit perplexed by the strange machine. But he almost had to search for the ring which was a great sign. It meant it was out of the way. Most importantly, he didn't have to dig deep to find it at all. The anchor was short indeed, which made the bench as maximally efficient as possible. And Ernest took care to keep it impersonal as he could. The bench was efficient. This was not to say that one could easily finger and fuck directly into the person inside with extraordinary ease. It was just an efficient bench.

And so, unceremoniously, Ernest switched from fingers and used the dildo instead. He listened to the bench again, quite keenly, for any indication of the person within. He was more curious than anything, and he knew his subject would say something if anything started to hurt. But again there was radar silence. Ernest was just inserting something into the rear of his bench. So he kept at it. He pushed the dildo up to the base of the bench and pulled it out. He applied more lube and it glided easily - and what reason did it have to not? His choice of material was sound, and no part of the machine was grabbing onto any other part. It was well oiled and lubricated, and effortless as well.

Ernest picked up his pace and measured how minimal the resistance was that he felt. Then he had the brilliant idea for a modification to the bench - a large peg you could insert, of varying length and width, and lock in place. It could be like a key, to keep the bench ready for use, or else closed up when it wasn't needed. To say nothing of the person who would be perfectly trapped inside.

Somewhere in his mind Ernest remarked how easy it was to start imagining if there was a person inside, instead of that. It meant the bench was working as intended, which had started to be sexy indeed. Before long Ernest actually caught himself wishing there was a person inside, because that would make the experience all the better. Never mind the fact that there actually was.

Experimentally Ernest traded out the dildo for a larger model. He took the next size up. It was slightly textured this time, and a little larger, but not by much. He only bothered with it for a few seconds though. It slid in equally easy, with exactly the same level of resistance. Which was to say, it didn't resist. Not that he needed or expected it to - but this was a stress test. So he skipped a few sizes and chose a larger implement.

His next choice was one of the larger ones. Its diameter at the largest ridge was still under four inches so they were clear on that level. But it was well ridged and knotted all throughout. It was a fantasy shaped dildo, and it might make for the ultimate test. Again, Ernest applied plenty of lubricant, and he took his time in inserting the toy to his bench - and still there wasn't a sound.

Ernest fucked the dildo in and out of his construction. He was testing the material of his anchor, and seeing how well it expanded. It seemed to handle fine, which of course meant that the panther inside was handling fine as well. Ernest did meet resistant towards the base of the dildo, however. He took his time, because he didn't want to stretch or tear his bench at all. So he slowly worked the dildo inside, and fucked it in and out a little bit. Then, with just a little extra force, he pushed the dildo all the way in.

He expected a grunt, or a moan, or an inhale of pain. Still the bench made no noise. It was silent as though he'd just bought it at the hardware store that morning. It was exactly as inanimate as it looked. That helped to unlock something in Ernest, like a sexual deviancy in himself which didn't too often get to see the light of day. He had loads of sex with his mate, but he rarely topped. And he was busy enough lately that he usually didn't play with himself. But with his new toy, and his sense of accomplishment in a project gone off without a hitch, he started to feel a little bit like a kid. He typically felt like a young professional more than a kid. Having a civil engineering focus tended to do that to you. But all at once he felt again just like a horny teen. Right now he was a teen with a new sex toy, and all the time in the world.

What more, he felt like he had loads of privacy, because in a way he did. He was alone in his room, or he might as well have been. And it felt like there wasn't a creature on earth who could judge him. Because, again, in a way it's like there wasn't a soul around. So he left that dildo inside his sex bench for a time. It was knotted at the end, and it had a flared base. It wasn't going anywhere. It almost looked like it belonged there. Just, a plug inserted into the end of his sex bench. Nothing more, and nothing less.

Ernest started to strip without realizing it. The only hiccup was when he noticed Finn's clothes cast off to the side of the room. Ernest hastily brushed those aside, and mixed the clothes into his hamper. Out of sight, out of mind. He stacked his own clothes onto the hamper, leaving him naked with his fresh construction. It felt taboo, but also freeing. And he was starting to get hard.

Then he was nothing save for a teen with a high sex drive, and a new sexual toy, and with only one thing to do. He took the plug out of the bench and positioned himself behind it. He had positions to test, handles to try out. He needed to find out what positions worked best, and to see how sturdy this device really was. Again, never mind that there was a person inside it. He had done his best to forget about that, and it had worked. He was alone and ready to go. His reservations had faded all away. He knew he had everyone's blessing to fool around with his mate's best friend. Everyone was on board, save for Ernest. But he had made the decision to go ahead with the experiment, and to take the bench for a proper spin. Again, it wasn't like anyone was actually inside of the thing.

Ernest had gone from soft to fully erect in no time at all. Deciding to lean into his sex drive was freeing and rewarding. And so, without much ceremony at all, he set his dick to the hole in his sex bench, and pushed himself in.

He met no resistance. By now the entrance was well stretched out, and more than lubed enough. It felt good going in. It felt tight and not at all fabricky, which he had been worried about. And on the inside it was warm and wet. His dick felt engulfed, and on the whole it felt right. It felt good to be inside of this bench he had built. For a moment he marveled at his own engineering. Here he had made a structure which was fuckable and inviting, and well constructed - and fun. And it was personal, just him in his room being a horny little teen. And he started to fuck into his new, over-engineered toy.

He was pleased to say that every one of his handhelds were perfectly placed. He could lean fully on top of the structure and pound into it with full force. Or he could stand erect and use a few handles to gently pump his way in and out. Most of all it felt perfectly natural. And of course, it felt amazing on his cock. He'd have had no idea there was a ring inside as an anchor, either. It was just a seamless experience. A bench with a hole for your dick. So he used it for what it was, for the purpose it had been made for. And it felt great.

Ernest went to town on that bench of his. And he must have been excited by the whole affair (but then, it had been weeks in the coming), because it didn't take long for him to cum at all. He forgot for a moment that there was a sort of reservoir for all that cum. He legitimately thought that he'd have to expand the sleeve inside to catch cum better. But then he laughed freely, because there was a great reservoir for cum after all. Depending on the subject inside, it could be a deep and willing reservoir indeed.

His sexual energy still overtook him. The possibilities of this odd structure were still somehow foreign to him. He fully intended to use some more of the implements he had, and he intended to use his cum as lubricant. Only, some of it was leaking from the hole in his bench. He didn't have to stop himself from licking it up. He was a true bottom, after all, and he loved the taste of cum. Even if it was well mixed with the flavor of lube (which was to say, it was additionally slimy and perhaps a touch chemically as well) - but it was cum all the same. As a further test of his device he sucked a little bit of the cum out. Then he caught himself eating out his inanimate sex bench and chided himself. But again, even that felt freeing. It felt great to be an unabashed, sex crazed teen again. It had been a long, long time.

Then Ernest reached for a particularly long dildo he had set aside. He carefully avoided the thought that Finn had brought it over. It was just one of the implements Ernest had happened to have on hand. It was a double sided dildo, improbably long, and he had no doubt at all that its entirety could fit in with relative ease. So he tested it out, again using plenty of lube. He stopped when it met resistance, and tried manipulating it as well as he could to work through whatever barriers it was meeting inside. He wanted to see how deep inside this bench he could get the dildo to go. Still the bench remained silent, even as the dildo found its way a little deeper inside. Then Ernest fucked the dildo in and out, then worked it deeper still.

He was careful not to push the whole thing inside. Then he'd have to open up his sex bench and fish it out, which he didn't want to do. But the fact of seeing that long dildo disappear into his bench was electric all the same. It kept him horny, and it wasn't long at all before he pulled the dildo back out, and went at the bench for round two.

He lasted longer this time. That suited him well, because he wasn't in any particular rush. He fucked into his toy hard, then he made slow pistons in and out. Then he leaned over and grasped at the full body of his construction, and he went at it again. When he came again he hilted into his device hard. He stayed inside it in his after glow, and rested against the large, hollow chamber with his full weight. He was pretty lost inside himself, and deeply content. Then, when he had finally had his fill of the thing, he pulled out and moved to collapse on his bed. But as an after thought he first picked up that large dildo again - the one with plenty of ridges and a final knot - and set it back inside. It plugged the hole as perfectly as it did before, and he tested it with an experimental tug. It was pretty firmly in there, and definitely not going anywhere on its own.

Then Ernest laid down on his bed, satisfied in his after glow, and in the waves of pleasure he felt from giving in to that teenage desires. Further more, on a more "young professional" level, his construction project had been a tremendous success. He was excited at its capabilities and its implications, and it was indescribably sexual and horny, in all of the best ways. He was excited to see what else he could get it to do.