Chapter Text
"Have you ever heard of free use?" Cecil asked between bites of the sandwich Carlos had brought home for dinner.
"Like…free use software?" Carlos asked, head cocked. "Of course. I've worked with a lot of computers over the years."
Cecil shook his head. "No, no. The kink. You know, where one partner lets the other use them for sexual pleasure whenever and wherever they want, no questions asked."
Carlos raised his eyebrows, staring at his boyfriend from across the dinner table, still mostly covered in boxes from their recent move. "Oh. Yeah, I think I've heard of it."
"Would you ever want to, I don't know," Cecil waved a hand in the air, "try it?"
"You can tell me if you think our sex is boring," Carlos laughed, though he couldn't help but feel a little self-conscious. They hadn't even been together for a year yet—was Cecil already getting bored of sex with him?
"Our sex is anything but boring! I've just always liked the idea of free use, but no one I've dated has ever been comfortable with it. And you can say no too!" Cecil said quickly. "I just wanted to ask, especially since it would be an easy thing to explore now that we're living together."
Carlos pursed his lips in thought. "Let me think about it over dinner. I don't mind the idea, but I think I would prefer it to have some conditions."
When dinner was done and they'd moved to curl up on the couch together, Cecil asked, "So? Thoughts on free use?"
"Would I be using you, or would you be using me?"
"I would really like to be the one being used," Cecil said, his body hot against Carlos as he blushed. "But I'm not opposed to it going both ways, if you're open to it."
"So I can just…pull you aside and ask for sex at any time?"
"You can do that already," Cecil laughed. "This is different. With this, I give you blanket consent so you don't have to ask. You just take what you need from me."
Carlos swallowed, ignoring the heat between his legs. "Okay. I would like to try it, but I do still want your consent."
"Verbal consent in the moment kind of takes away from the whole 'free' part, don't you think?"
Carlos thought for a moment. "Then what if we find a way for you to give me nonverbal consent?"
***
That conversation was two weeks ago. Cecil agreed to wear a specific piece of jewelry (a neon purple ear cuff on his left ear) when he's willing to let Carlos use him for sexual gratification, no questions asked, no matter what else he might be doing.
In those two weeks since their conversion, Cecil has only taken that ear cuff off once, when a chemical leak in the radio station gave him a terrible migraine.
And in those same two weeks, Carlos still hasn't tried anything yet. They've had their usual sex, of course, but Carlos hasn't taken advantage of Cecil, not in the way Cecil asked him to.
Today though? Carlos thinks he might try it. He's had a rough day at the lab, and sometimes sex is just what he needs to take his mind off experiments gone wrong. So, if Cecil is wearing his ear cuff, then Carlos will grab him by the hips and—
He groans. Just thinking about what he might do to Cecil is making his clit ache. He wants to text Cecil, to get him worked up or to tell him what he wants to do, but he knows that isn't part of their agreement. No, he needs to surprise Cecil, as long as he's wearing his silent indicator of consent.
Carlos isn't a religious man, but by the time he's driving home, he's hoping and praying Cecil will be wearing his ear cuff. If not, Carlos can always try turning Cecil on for the sex they're used to, or he can simply take a cold shower, but he knows how excited Cecil was when they discussed their free use conditions.
When he steps inside their home, Cecil smiles up at him from where he's sitting on the couch. He's wearing his ear cuff, and Carlos does his best to hold back a grin.
"How was your day?" Cecil asks sweetly.
"Stressful," Carlos answers, toeing off his shoes before making his way to Cecil. He doesn't really know what he wants to do, but he's always been pretty good at coming up with plans on the spot. "But I think you can help."
Cecil cocks his head curiously. "You know I'm always happy to—" Carlos climbs into his lap, straddling his hips and ducking his head to nip at his neck. "Oh."
It feels strange to be so forward. They've been sleeping together for several months now, and their sexual encounters have become much more frequent since moving in together a few weeks ago, but Carlos has still been a little shy about voicing his needs to Cecil. Texting Cecil and telling him he's pent up is easy, but climbing into his lap and immediately grinding against him? That's not something he's done before, though the thought has always been there. Maybe this whole free use thing will help him be more forward, but he won't know until he tests it out a few times.
He grinds against his boyfriend's thigh as he leaves rough kisses along his neck. He's aware of the growing, writhing bulge in Cecil's pants, and the pooling wetness in his own, and he strips off his lab coat, tossing it to the side.
"Cecil, do you—"
Cecil cuts him off with a gentle tug of his hair. "Don't ask," he reminds him, his voice already husky with arousal. "Just take what you need."
Right. Cecil already gave him his consent, and they'd already discussed a safeword, but Carlos knows it may take a few tries before he gets used to not asking in the moment.
He almost apologizes, but knows that's not what Cecil wants him to do. Instead, he grinds a little harder against Cecil's thigh. "I'm going to take my pants off," he whispers into Cecil's ear. "And you're going to take out your tentacles so I can ride you. Keep the rest of your clothes on." He pulls himself away from Cecil so he can remove all his clothes from the waist down. He keeps his shirt on, not wanting to waste any time when Cecil frees the writhing purple tendrils from his pants, stroking them a couple times to spread his natural lubricant over their lengths.
"Look at you," Carlos purrs as he gets back in Cecil's lap. "Always ready for me." Without hesitation, and forgoing their usual foreplay, he lowers himself down onto the largest of the three tentacles. It slides inside with the delicious stretch he's come to crave, and he leans in to kiss Cecil deeply when it starts to writhe in his pussy.
"Oh, Bunny," Cecil moans while Carlos rolls his hips.
"You're going to be good and make me come, aren't you?" Carlos asks, his voice a deep growl in Cecil's ear.
Cecil nods quickly, gripping his boyfriend's hip with one hand and teasing his fingers beneath the fabric of his shirt. With the other hand, he reaches between Carlos' legs to stroke his clit, but Carlos bats him away with a grin.
"Carlos," Cecil whines. "Please let me touch you."
Carlos doesn't stop rocking his hips. "You have two other tentacles you're not using."
"How should I—"
"However you want." He nips at Cecil's earlobe. "Keep your hands in my hair."
As expected, Cecil wastes no time. "Like this?" He asks, enthusiastic as he tangles the fingers of both hands into his scientist's hair.
"Exactly," Carlos grins. Before Cecil, Carlos never liked anyone touching his hair. But Cecil? Cecil touches his hair like he's worshiping it, and Carlos has come to adore that worship. He's about to lean in to kiss Cecil's throat when he feels a second tendril press its way inside of him, and a third begins to stroke his clit. His hips jerk forward and he moans his boyfriend's name.
He tries to be rough, knowing that's exactly what Cecil wants from him. He bites Cecil's neck, leaving faint marks behind, and he rolls his hips until Cecil is whining in pleasure beneath him. He wants to come, needs an orgasm that will help him forget his day, but he wants to make Cecil come too.
"Cecil," he rasps, body spasming at the relentless tendril against his clit.
"Come for me," Cecil purrs.
Carlos grins. "You first." He braces his hands against Cecil's shoulders, using them as leverage when he starts to rock his hips a little faster. "I won't come until you do." He knows it's a threat he can't guarantee, not if Cecil keeps stroking his clit, but he's certainly going to try to make it a reality.
Cecil looks like he wants to argue, but Carlos kisses him roughly before he can, drowning any arguments with moans.
"Fill me," Carlos begs against his lips before lifting his hips high enough so that only the tip of Cecil's longest tentacle is still inside him.
"You want—" Cecil starts before gasping when Carlos drops down, taking the full length of his tentacles inside him.
"I do."
"So you finished your experiments?" Cecil asks, voice shaky and tentacles writhing as he nears his orgasm.
Carlos nods. "I did last week. You're safe to finish inside." They've had unprotected sex plenty of times before—they both took their legally-required sexual health blood tests while filling out paperwork before their first time together, and Carlos keeps meaning to make a condom that will actually work with Cecil's tentacles, but simply hasn't gotten around to it—but thanks to Carlos running multiple experiments and recently concluding that the ejaculate from Cecil's tentacles can't get him pregnant, this is the first time Carlos has explicitly asked Cecil to come inside him, rather than somewhere on his body.
"Oh," Cecil moans as if the knowledge alone is going to tip him over the edge.
Carlos lifts himself fully off of Cecil's tentacles, a soft whine escaping him at the sudden emptiness, before dropping back down and taking all three inside. "Come," he says, trying to sound demanding, but he's so close to his own orgasm that it doesn't come across as anything more than a plea.
"Carlos!" Cecil cries after two more times of Carlos rising and falling in his lap. He throws his head back against the couch, baring his neck and pulling Carlos flush against his chest as he comes.
Carlos can feel the liquid heat filling him, and the sensation makes him moan and ride Cecil a little faster. Everything is extra slick and extra messy, and perhaps he wouldn't have asked Cecil to keep his pants on if he remembered how much of a mess his inhuman cum usually left behind, but the mess is the last thing on his mind right now. He should have hypothesized that the knowledge of Cecil's release inside him would have made him feel more desperate for his boyfriend, but that's a conclusion he can add to his notes after he's done getting everything he can out of Cecil.
"Close," he finally moans, burying his face against Cecil's neck, and it's one of Cecil's hands moving between them to rub his clit that finally sends him over the edge. His vision whites out for a couple seconds, and the muscles in his thighs are trembling almost violently when he finally comes back to himself and he's aware of Cecil's hands on his hips.
"You're shaking," Cecil says with gentle concern.
"That was…" Carlos catches his breath, trying to calm the trembling in his legs, but it's a lost cause when he can still feel his lingering orgasm. "That was incredible."
"It was a very nice surprise." Cecil massages his fingers against Carlos' hips and thighs.
"You were wearing your ear cuff," Carlos says, bringing a hand up to tuck Cecil's hair behind his ear so he can smile at the sight of the cuff. "And I had a long day at work that left me wanting intimacy with you. I figured it was time for me to finally take advantage of our free use agreement." He carefully gets out of his boyfriend's lap, whining when tentacles brush against his oversensitive clit. He can feel Cecil's release dripping down his thighs, and does his best to avoid making a mess on the couch by pulling his shirt off and tucking it beneath him when he curls up against Cecil. His mind is fighting between overstimulation from the sensation, and a need to let Cecil fill him like that more often. "Was that what you were hoping for?"
"Bunny, it was amazing. Though you can definitely go a little rougher in the future," Cecil grins. "If you want to do this again, that is."
Carlos matches his grin. "Any good scientist knows an experiment needs to be repeated multiple times in order to confirm any findings. I believe this experiment was successful, but I would definitely like to repeat it until I'm feeling more confident. Then we can really know how much we want to keep doing this."
"And have you put any more thought into wearing a piece of your own jewelry?"
When they discussed their boundaries with this particular kink, Carlos told Cecil that he might like to take a more submissive role sometimes, but that he'd need to think about it and let Cecil take that role more often than not in the beginning. "I think I'll want to soon enough," he says. "But I'm not ready to give up that control yet."
Cecil nods. "Understood. You can keep taking advantage of me all you want then."
"I will," Carlos promises. "And it's important to change up the variables during experiments, so I can assure you I won't just be riding you on the couch every time. I have a few ideas of things I could do—"
"Don't tell me!" Cecil cuts him off with a dramatic gasp, as if Carlos was just about to spoil the ending of his favorite television series.
"You don't want any hints?" Carlos asks, an eyebrow raised.
"I trust you. I want you to surprise me! Maybe I'll give you a few hints on things I want, but you can't tell me any plans!"
Carlos can't help but laugh. "You're so cute. I won't tell you, I promise. But I will write down my ideas in one of my notebooks, so it's not my fault if you happen to stumble across any notes on how I want to take advantage of you."
Cecil's body heats against him. "Keep talking like that and I might just ask to take you to bed."
Carlos grins. "I wouldn't be opposed to that, you know."