Chapter 443: [Vol. 10 pt. 15]

“Let the log show that the test subject has extraordinary self-control,” Eva said, talking into a pencil that she was pretending was a tape recorder as she paced back and forth in front of Fenrir. Though, just saying that she was pacing back and forth in front of him didn’t do justice to the situation.

After all, Fenrir was tied down to the bed, mostly dressed still save for his pants that were pulled down enough for his erect length to stick up in the air, throbbing with zero external stimulation. The lack of external stimulation was probably why it so desperately throbbed as if it were begging for even the slightest touch.

But no touch ever came, and neither did he.

“It’s been five minutes now,” Eva continued. “The subject has successfully managed to not make a single noise nor movement, excluding the movement of his reproductive organ, but that is not something he has control over.”

Oh, he did. Fenrir made sure to flex his pelvic muscles every now and then to make his cock “throb” even more. He was fairly sure she didn’t even know it was possible for guys to do that, and he was also sure that she loved the sight of it happening. Her eyes watched with a carnal hunger every single time he throbbed and “throbbed.” She would even stop in the middle of a sentence to watch until it calmed down.

“At this point, I am not even sure he his organ will go flaccid without any stimulation. My original hypothesis was that, without any stimulation, he would fail to remain erect. Yet, he has. Further waiting would be cruel and in violation of scientific ethics, so I will have to end this particular experiment for the moment. That means I may now proceed to the next experiment.”

Fenrir’s cock throbbed all on its own that time. Especially since he was pretty sure that it meant he was about to actually get some service after staying on the bed, silent and still, for so long.

What he also really wanted was a simple “good boy,” but he wasn’t allowed to ask for anything seeing as how he wasn’t allowed to speak at all. Or rather, he was told before they even started, “Let’s see how long you can give up total control for. It’ll be a fun experiment. No moving, no talking—nothing. All you’re allowed to do is lie there.” And so far, he had been doing an incredibly good job of that excluding purposely making his cock throb sometimes to compliment its natural throbbing.

“For this next experiment, I will test and see if it is possible for the subject’s reproductive organ to ejaculate solely through stimulation of his ball—scrotum… I think scrotum would be a good enough scientific name for it, anyways.” Eva shrugged. She was tempted to go and search up the technical term right away, but she didn’t want to ruin the mood. Then it hit her. “Oh. The testicles. Alright. I will test and see if it is possible for the subject to ejaculate solely through testicular stimulation.”

With that, Eva approached the foot of the bed, climbed up onto it between his legs while looking up into his eyes, and settled herself down on her elbows between his thighs. Even though she licked her lips, she resisted the urge to do anything with her mouth and instead reached both hands forward to cup each of his orbs within them.

“The subject’s testicles feel especially full and heavy,” Eva said, speaking to the pencil that she laid down next to his leg on the bed.

It doesn’t really work that way, Fenrir thought to himself, but you’re too hot to care. Also, give me some praise, please.

Back to Eva, she very clearly didn’t exactly know what to do with his sack and the orbs within it. Her hands’ ministrations were slow, clumsy, and random. She bounced his orbs within her hands, rolled them around a little, gave the sack some gentle tugs that didn’t exactly feel pleasurable. Though, eventually, she found out that the best way to make his cock throb some more was to simply fondle them with her fingers. There was nothing complicated about it. All she did was tease them with her fingers.

But alas, that was not enough to make him cum.

“The subject has not ejaculated yet despite my efforts. However, it is too early to rule out ejaculation via testicular stimulation,” Eva said, bringing her hands away from his balls to instead lower her face toward them.

Now, Eva thought it would be hot to pull her hands away to instead use her mouth on his cock without any help from her hands.

But as she figured out…

That was rather difficult.

His sack was hanging down against the bed. He still had his pants on which made it a bit difficult to lower her head close enough to his balls, not to mention that his thighs weren’t fully spread out to make room for her head. She was able to get her mouth to the top of his sack, but actually doing anything with the orbs sitting in the bottom of it was too difficult for her to accomplish without assistance from her hands.

She still tried to, of course. She really did. For the better part of a minute, she did her best to get his balls up to her mouth using only her tongue. She thought that, maybe, she would be able to reach her tongue underneath one of his nuts and then lift it up to her mouth that way. She even partially succeeded… only for his nut to slip right off of her tongue.

Eva wanted to do some hot, sexy scientist play with Fenrir. Instead, she ended up making herself feel like an awkward virgin who had no idea what she was doing while being silently judged. It didn’t help that, somehow, Fenrir accomplished the impossible of keeping a totally blank expression on his face. He wore the face of a man who was either incredibly disappointed and no longer felt anything… or who was doing everything in his power not to laugh.

It was the latter.

Don’t laugh, Fenrir. She’s your girlfriend trying her best to experiment and do lewd things. She’s vulnerable right now, even if you’re the one who’s tied up to a bed with your dick out. Just… don’t laugh.

Amazingly, despite the odds stacked against him, he did successfully manage to resist the urge to laugh. And his reward? Eva still feeling comfortable enough to surrender and use her hand to reach forward, grab his sack, and lift it up enough for her to place a kiss against his nearest orb. Then a lick. And finally, a suck. While pleasuring that one orb with her mouth, she even used her hand to work the other, fondling it and teasing it with her fingers.

The results of her actions were even more throbbing and more precum leaking out from the tip of his length, causing his tip to glisten with how much has already leaked out.

As for Fenrir, he decided to just shut his eyes and enjoy the feelings. They might not have been enough to make him cum, but that didn’t matter. It still felt good. It was relaxing, too. All he had to do was lie there and be played with. Sure, he wanted to be called a good boy, but he didn’t need that. He especially wasn’t about to be greedy and break the rules just to ask for it.

As for Eva, she realized that there was only so much that she could do with his nuts. They just didn’t offer as many options as his cock, not to mention that she was afraid of accidentally hurting him at any moment even though the nuts in question were purely virtual. “After several minutes of purely testicular stimulation, the subject has still not ejaculated. I believe that it is instead time to—”

“Ooh, hot,” a familiar voice said, speaking up from behind Eva. “Oh. Sorry. Didn’t mean to interrupt.”

Fenrir opened his eyes to confirm who he heard and, surely enough, he was right.

Serra.

“Se-Serra?” Eva asked. “When—how did you…”

“The door was unlocked. And I had a feeling that something lewd was happening somewhere, so I came looking for it,” Serra answered.

“Do you have lewd senses or something?”

“Yeah. Probably. I can always tell when there’s something lewd happening.”

“I—I see.”

“Can I watch?”

“I… have to admit, I feel kind of awkward now that you’re here. It’s not that I’m uncomfortable with you being here, but…”

“I get it.”

“You do?”

Serra nodded. “It can be hard to roleplay in front of others.”

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“I… wouldn’t really say I was roleplaying… okay, I was. Kind of.”

“I’ll play along. We’re doing science on him, right?”

“Kind of?”

“I can help. I’ll be your lab assistant.”

Eva still looked a bit nervous about the situation, but Serra was her girlfriend, too. She would never be opposed to one of her girlfriends joining in on the fun. Plus the more the merrier. All she had to do was find it in her to be a bit more bold now that she was being a dork in front of two people rather than just one.

But at the same time, the new person joining in was Serra.

And there was nobody better to suddenly join in on the lewds than Serra.

If there was one person out of the entire relationship group who one could shamelessly perform lewd things in front of, it was Serra. No matter what it was, as long as it was lewd, there would never be any shame coming from Serra.

So, reminding herself of that, Eva took a deep breath and said, “Assistant Serra, the last experiment involved trying to make the subject ejaculate only by means of testicular stimulation. The experiment seems to have failed under my tests. Do you have any suggestions?”

“Tried before, didn’t work,” Serra said. “He needs more to cum. I mean… the um… subject needs stronger… stimulation, to cum. To ejaculate.”

“I see. Then the experiment is likely a failure.”

“I have an idea. What if I play with his balls—I mean, what if… I stimulate his testicles while you stimulate his… penis?” Serra might have enjoyed roleplaying during lewds, but she was clearly out of her element trying to be scientific about it. Even so, she did her best and Eva appreciated that.

And Fenrir was just happy to get serviced at all.

“That might work,” Eva said. “Combined stimulation via both components of his reproductive organ. Though, I believe he may ejaculate too quickly in that case. Instead, I propose this for an experiment: we see how long he can last.”

Serra looked at Fenrir with a smile that made him very, very worried. “Sounds fun.” Her voice was still monotone no matter how sadistic her smile was.

“Then, here, would you like to take my position? I believe you may be better suited for this part.”

Serra nodded as she was happy to take Eva’s placed between Fenrir’s legs. And while she repositioned herself to between his legs, Eva moved to lie next to his leg while one hand gripped the base of his cock to point its tip toward her. But, before Eva could even begin working on his cock, she stared with amazed eyes at Serra as she did what Eva struggled with so severely. Serra had no difficulty in, without using her hands, deploying her tongue to lap up Fenrir’s nearest nut with her tongue to pull it between her lips. From there, it was no issue at all popping it into her mouth to suck on while looking at Eva to see what she was going to do.

Part of Eva felt challenged. She wasn’t sure how she was going to practice something like what Serra just accomplished, but she was determined to find some way to practice it so that she could do it just as effortlessly.

But until then, there was something else Eva could do, and that was to suck some dick.

Though, she didn’t jump straight into sucking. Instead, Eva approached the base of his cock where her fingers were wrapped around it and slipped out her tongue to give it a little lick. Then another lick. Then a few more. Once she was sure that the base of his cock was thoroughly licked, she gently and slowly traced her tongue up along his shaft until she reached his frenulum. Quite a few more licks were applied there. Short and quick licks at that. The licks were then replaced with kisses, and the kisses evolved into her bringing her lips right over the tip of his cock to place a single kiss on the very tip that still glistened with his precum.

Serra then let his nut slip out from her mouth to say, “I’ve never seen it throb this much. He must really like it.”

“The subject’s reproductive organ is expressing great desire to breed,” Eva said. “But the question remains: how long can it remain in such a state for?”

Fenrir wanted to say something—he wanted to beg for them to make him cum, but he resisted and bit his lower lip instead. Technically, that was moving some part of his body, but Eva decided that it was alright for him to do that. Blinking and breathing were supposed to be all that he was allowed to do was far as moving went. Biting his lower lip was hot, though, and made Eva feel good about herself.

So, the torturous teasing began.

Serra masterfully worked his balls while Eva, more amateurly, pleasured his shaft. The former fondled and sucked while the latter licked and also sucked. Though, no matter how much Eva sucked his cock, she never took more than half of it into her mouth. That would have been too nice for him and she didn’t want him to cum yet. Not to mention that, due to the size Fenrir made his cock in-game, she was a bit intimidated by trying to fit all of it into her mouth.

Then, at one point, both girls stopped even trying to pleasure him to instead play with each other. It started with kissing each other around the tip of his cock and evolved into making out with one another over his thigh, his poor cock completely left unattended to as they made out.

Yet, no matter how desperate Fenrir was to cum, he remained hard and obedient.

Thankfully, they didn’t plan on torturing him for much longer.

“The subject is still erect and behaving,” Eva said. “I think it’s time to move onto the final experiment.”

“What’s that?” Serra asked.

“It’s time to test the subject’s cum volume. It will be measured by…” Eva had to stop when she realized how cheesy what she wanted to say was.

“By what?”

“Err… I… was going to say, it will be measured by… measuring how much he releases inside of me.” She was still able to force herself to say it even if it also made her want to cringe.

“Nice. And I have an idea.”

“What is it?”

Serra smirked and climbed around on the bed until she was on her knees next to Fenrir’s head. She then reached under her skirt to slip her panties to the side before placing her knees on each side of Fenrir’s head, straddling him with her exposed crotch directly above his face. “See how long he can hold his breath while you measure his cum.”

“Going by the throbbing… I think the subject likes that idea.”

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