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Donnie made the best toys.
Small and powerful, large and ribbed, curved with suction - you name it, he could make it.
It was one of Leo’s favorite things about him - that big juicy brain and those capable hands - that never failed to make him weak.
The genius knew how to use all of his creations to produce the best results and that included his trademarked and patented (Extra, as always.) GeniusBuilt adult toy collection.
The first time Leo had tried a vibrator - a tiny bullet vibe he got from a fucking convenience store when he was 16 - it was…interesting, to say the least.
The vibrations themselves felt fucking unreal against his clit, but it took a lot of fumbling to get the right angle and stroke to make him cum.
Donnie had no such trouble during their first play session two years later.
Apparently, the softshell had been making himself toys since he was a budding horny teenager (Could have shared the wealth with his favorite brother, but that’s neither here nor there.).
And while he really only had toys for those of the dick wearing variety, an all nighter and several cups of coffee from the barista station in his lab provided a bountiful harvest of Leon-tailored pleasure machines - plus a more…creative pleasure item - to be tested on the slider the next day.
It was Friday, after all, and their standing date night.
By his calculations, he had four hours to make some final adjustments and tilt Leo’s world sideways at six o’clock.
Time couldn’t pass by slower.
LDLDLDLDLDLDLDLDLDLDLDLDLDLDLDLD
Leo actually had to stop himself from sprinting towards his boyfriend’s room tonight.
He was feeling extra needy today and had gone far too long without seeing his Donnie.
It wasn’t uncommon for the genius to go AWOL in his lab for hours at a time before they’d gotten together.
Since then, Leo had been able to coax him out quite often - the promise of kisses and cuddles was always a sure way to get Donnie into the slider’s bed.
The last time Donnie locked the door to his lab was over two years ago when he’d stumbled through a confession of his feelings for Leo and then promptly ran away.
The slider spent a good two hours talking to his dumbass genius through a vent before he finally unlatched the door so Leo could jump him in their first kiss.
Who knew someone so fucking smart couldn’t see just how mutual their feelings were…
But it’d been a long time since then and Donnie didn’t even come to say goodnight or respond to Leo’s “I love you. See you in the morning.” text.
He’d better have a good reason for it too cause Leo had to fight his insomnia - something only Donnie could prevent - extra hard to get to sleep last night.
And now he was lonely, deprived, and horny.
The slider was more than ready to rectify Donnie’s misgivings.
Leo was lifted from his mental imagery of Donnie whimpering beneath him when he heard…whirring? coming from his partner’s room.
Like a machine whirring but…quietly. Kinda like how Donnie’s lab sounded?
He pushed open the door and closed it behind him, “Donnie? What’s that-”
Oh.
Oh, fuck.
The softshell in question was settled back into the bed among a mountain of pillows and that whirring was a palm-sized toy sheathed over his big slick dick that was…jacking him off?
Fuck, it was almost too hot to handle.
His genius smirked, “Yes, baby?”
So this was how tonight was gonna go.
Leo was getting soft dom Donnie.
What a treat.
“Uh, whatcha got there?”
Donnie beckoned him over and Leo crawled between his knees to get a closer look, “This is one of many toys I’ve crafted for myself over the years and a personal favorite. The inside is made of silicone and ribbed to mimic well…” his expression turned sheepish, “you and what I could conjure on feeling alone.”
A few taps to his gauntlet and the machine slowed to a stop.
He grabbed Leo’s hand and urged him to feel the inside of the toy.
It was soft and slick - probably from Donnie’s natural lubricant - and was…ribbed on the inside.
Leo knew what he felt like, obviously.
He’d explored himself before, but it was kinda weird to feel it and see it…wrapped around his boyfriend’s dick.
“It’s nothing compared to you, but we’re not always together and this is the closest I could get.”
The genius’s smirk returned, “Unless you’d let me make a proper mold.”
Leo chuckled, “You wanna fill my pussy with silicone? Instead of your dick?”
“Could it be both?” The slider turned an unimpressed look on him and Donnie laughed.
Asshole.
“It’s not going to be either if you don’t take this thing off.”
Leo freed Donnie from the toy and leaned in to give him a proper greeting.
Long, soft kisses were exchanged between them and Leo was so content.
This was what he’d missed the most.
While kisses would always be his favorite, it was more than that. He loved the intimacy he and Donnie shared.
Whether it was snuggling into the softshell’s lap while he tinkered with a new invention or lounging on a rooftop together staring up at the Hidden City’s dark, seemingly endless sky, Leo was just happy to be there with his Donnie.
A dozen more kisses and Leo finally pulled away, “I missed you, ya know.” the slider’s face pulled into a pout, “You didn’t even come to say good night.”
Donnie sighed and dropped another kiss to his love’s mouth, “I know, but don’t worry, I’m going to make it up to you. Turn around.”
Leo’s face scrunched up in confusion, but he turned around anyway, curious as to what his boyfriend had up his sleeve.
He was gripped by the hips and pulled down to rest his shell against Donnie’s plastron.
A kiss met his shoulder as the softshell wrapped his arms around Leo in a hug.
Before the slider could complain about being too horny to cuddle, especially after the show he was presented with earlier, Donnie spoke, “I spent all of last night building new toys for you and I thought we could try them out today.”
“Toys?”
“Toys. And…a bit of a surprise…” Donnie’s arms loosened their hold as he reached behind them to grab something off the nightstand.
Before Leo could turn around to see what it was, a small bottle was placed in his hands.
It was filled with a thick, pink liquid that almost looked like lube.
He popped the cap and the smell of strawberry flavoring cut through the scent of their combined arousal and now Leo was even more confused, “What is this?”
“It’s called ‘Sensitizer’. It can be made with many different enhancers, all tailored to increase pleasure.” Donnie plucked the bottle from Leo’s hands and put a dot of it on his finger, “However, this contains much more stimulant to accommodate our mutant composition.”
He gently grasped the slider’s arm and rubbed the product on the inside of his elbow, “This will be our test patch. If there is no reaction present 10 minutes from now, then we can proceed with tonight’s initial plan.”
“A reaction?” Leo turned in Donnie’s hold to meet his eyes, “What was this stuff supposed to do anywa- Oh.”
The slider shivered as a tingling sensation crawled over the tester patch. It felt warm and almost…muted?
He grazed a finger over the area and a burst of sensation ran up his arm, but it was…less? More sluggish maybe?
Still felt nice, but…different.
There was definitely a whole lot of ‘stimulant’ in there, though.
“Menthol, as a topical agent, acts as a counter-irritant by imparting a cooling effect. And, by initially stimulating nociceptors and then desensitizing them.”
“Uh huh…so how does that all translate to english?”
Donnie chuckled, “It stimulates pain receptors to bring blood to the area, and then deactivates those pain receptors so you’re left with, what most describe as, a warm, ‘buzzy’ sensation. It’s a form of foreplay that can intensify feeling.”
“Foreplay?” The softshell turned him around once more, “So this is going on my…”
“Yes.”
Huh…interesting.
“Oh…okay then…do you want to or should I- mmpf”
While Leo loved all kinds of kisses, surprise kisses were Donnie’s favorite.
Something about catching him off guard and…feeling his slider melt into it…that part always made Leo blush.
The little bottle returned and Donnie squeezed a generous amount onto the pad of his finger.
He instructed Leo to place his legs on either side of Donnie’s knees and scoot down til he was comfortable, “This is exciting, Coin-Op. Are you gonna start pulling vibrators out of your top hat?”
“If you’re lucky.” Leo laughed at that and then gasped as Donnie’s gelled finger made contact with his clit.
“Oh, that’s fucking cold!” The slider hissed as his hips involuntarily moved away, putting pressure on his boyfriend’s dick that surprised a moan out of him. (Donnie was a bit of a masochist, no one was surprised.)
“Careful, Nardo.”
Leo sighed and repositioned, holding his breath for the next swipe, “Sorry, I think I broke your dick.”
“You did not.”
“Good, cause I wanna ride it later.”
Donnie hummed, “I’d love for you to ride me later.”
The softshell continued to trace slow circles over his love’s clit, claiming that the tissue needed to be stimulated in order for the sensitizer to affect it (Let’s be real. He just likes to tease the fuck out of him.). In the meantime, his boyfriend nipped a line of kisses along the side of his neck as the slider’s body hummed in pleasure.
Leo could feel the slow rise of his orgasm already, not sure if he’d be able to hold out long enough for the experimental sensations to begin.
A particularly sharp nip to his pulse point made the slider turn his head and Donnie met him with another one of those deep, toe-curling kisses.
So nice…
They pulled away and met each other’s eyes, “I love you, Coin-Op.”
He really did.
Ever since they were kids, he’d always been drawn to Donnie and Donnie had been drawn to him.
Sure, they’d had their spats and ugly moments. Donnie liked to flex his intelligence over him (The slider didn’t have enough fingers or toes to count the amount of times his brother had called him a dum-dum.) and Leo had a penchant for teasing the softshell.
When they were seven, Donnie found an almanac while they were trash picking and spent four whole days memorizing and reciting fact after fact until the slider had enough.
Unfortunately, he wasn’t able to escape his brother’s ‘speech mode’ until they were ten and had separate rooms.
So, Leo stole the cursed book and hid it under their bunk.
When the genius interrogated him over it, the slider would ask a question specifically about something Donnie hadn’t yet memorized.
When his brother would get frustrated for not knowing the answer, Leo would sigh and dramatically declare that “It’s probably in the almanac. Sucks that you lost it.”
By day two of that cycle, Donnie leapt onto the slider’s back and clawed at him like an angry cat.
It’d been eleven years since then and a lot had changed.
They still loved to annoy each other to no end, but instead of fighting over it later, they fucked it out of their system.
And…they made sure to spend time with each other, do nice things together, and now Donnie was staying up all night making actual gifts for Leo…
So yeah.
He loved him quite a bit.
And Donnie loved him just as much, “I love you too, Sugartail.”
Leo chuckled at the nickname and hummed happily, eyes drifting down to watch the finger toying with his clit.
He was starting to feel the buzzing sensation now.
It was getting more intense with each stroke and it felt…really fucking good.
Warm and tingly and spreading pinpricks of pleasure over the entirety of his vagina that was throbbing and pulsing rhythmically and ohfuckhewasgonnafuckingcumshit-
A long moan left Leo’s lips as his hips bucked against Donnie’s hand, “Fuck, fuck, fuck, fuck- Donnie!”
“Shhhh…relax, baby, breathe.” The softshell removed his hand from the slider’s clit to rub soothing circles over his inner thigh.
The arm still banded around his waist held Leo upright as he took a moment to breathe.
Finally composed, the slider slumped back against his partner, “That was unexpected.”
Donnie kissed his cheek, “Unexpectedly good?”
“Very good. Can we do that again?”
“I’m so glad you asked.” The genius reached for the nightstand again and produced a…vibrator?
It was a longer toy that tapered into a skinny rod and at the top, there was a purple silicone ball about the size of Leo’s smallest fingernail, “What does this one do?”
“This is called a ‘Clitoral Vibrator’.” He took the toy from the slider’s hand and turned it to show that there was a button on the underside.
“All the vibrations are concentrated at the top.”
Donnie switched and gently grazed it over the test patch from earlier, “Whoa!”
A burst of sensation made Leo involuntarily jerk his arm away, “Are you trying to kill me?? I’m gonna fucking pass out if you put that on my clit!!”
Donnie chuckled - chuckled - and placed a kiss on the slider’s pout, “It has multiple settings. That was the highest. Now, lift your hips.”
Leo sighed, but did as he was asked and the genius reached between them to slot his dick into the slider’s now achy vagina.
Fuck, that was exactly what he’d needed.
That *stretch* and full feeling was so nice.
He could stay like this for hours - and had, mostly while Donnie worked or during the night as they slept tucked against one another.
He squeezed his walls around the length and Donnie groaned, “Yea- fuck...that’s next on the list.”
Before Leo could retort, the softshell parted his nether lips with one hand and pressed the vibrator next to his clit with the other.
All traces of previous nerves disintegrated as a strong jolt of pleasure shot up the slider’s spine.
He arched into it, moaning all the while as Donnie moved the toy in half circles over his hood.
“Fuuuuck that feels so good-”
The intense vibrations combined with the tingling sensations from the sensitizer were sure to send him over the edge quick. He was still sensitive from his first orgasm and the new buzzing warmth between his legs was driving him higher and higher.
“You feel fucking amazing, baby.”
It was purred into the side of his head and Leo rutted his hips as the haze of pleasure consumed him, “Are you going to cum already? Too much for you to handle, hm?”
Fuck, he spoke too soon.
This was full blown dom Donnie and he was gonna make Leo scream.
Needy whimpers fell from the slider’s lips when Donnie flicked the vibrator up another setting, “Let’s see how fast we can get you there, a sub experiment, perhaps?”
He was practically fucking himself on the softshell’s dick now, unable to keep still as his orgasm suddenly slammed through him.
His boyfriend moaned along with him, the slider’s vagina viced around his dick as he spasmed.
Donnie finally switched the vibrator off and removed it from his clit.
Leo rode out the rest of his orgasm with miniscule rocks of hips as the genius peppered kisses over his cheek, murmuring about how well he’d done and how beautiful he looked cumming on his dick.
A green forearm appeared in his periphery, “One minute and thirty-six seconds. Good boy, Nardo.” He skimmed his hands up his sides and the slider managed a small shiver, “So pretty for me, baby…are you still up for more?”
Leo turned to catch the softshell’s lips, still coming down from that absolute sucker punch of an orgasm, but always ready for whatever Donnie wanted to give him.
One more languid kiss and he pulled away with a soft pop, “Mmmm, yes please.”
The softshell captured his lips once again, slipping his tongue into Leo’s mouth to make them both moan…
And then gasp when Donnie lifted Leo by his hips to cant his own in a slow grind, right into Leo’s g-spot.
Fuck.
He was three orgasms in and Donnie hadn’t even gotten his first…
Leo definitely wasn’t going to be able to hold off his fourth either. Donnie was way too good at making him cum.
Guess he’ll have to rile him up…it’s a good thing Leo’s the best at that…
"Hey Donnie,"
A soft grunt, "Yes baby?"
"Do you think that my pussy gets so wet cause of my species?"
"Wha-...” The softshell’s grip on his thighs started to slip, “Is this really a good time to be asking this?"
"I think my turtle ancestors foresaw this moment and wanted to make sure you could slider-ight inside me."
Leo felt his boyfriend’s scowl at the side of his head, “Real funny- *fuck*” his rhythm began to falter, “Keep it up, pretty boy. I’ll take your toys away.”
The slider chuckled and then moaned at a hard thrust, “Nah, you like using them on me too much.”
“Well, since you know everything,”
Before he knew it, Leo found himself plastron down on the bed with Donnie fucking wildly into him.
He nearly choked on his scream when the softshell reached a hand under him to furiously rub at his oversensitive clit, “Tell me, Nardo. How wet can you get for me?”
Between the fucking pounding his vagina was receiving coupled with the sharp teeth clamping down on the back of his neck and the near overwhelming pleasure stemming from his tortured little nub, the slider felt a different kind of pleasure rising between his legs, “FUCK- Donnie don’t stop don’t stop don’t stop-”
Leo’s eyes rolled to the back of his head as his body spasmed, soaking the sheets underneath him.
A few more thrusts and Donnie followed right behind him.
The slider felt a warm burst of cum and then his arms gave out, his lower body suspended only by the genius’s death grip on his hips.
Panting on the come down, the softshell removes the pre-emptively placed towel under them and flops them on their sides for some much-needed cuddles.
“Leo? Are you still with me?”
The slider manages a tired grumble and Donnie chuckles, pulling him closer to nuzzle the back of his neck.
“I take it the experiment was successful?”
Leo grunted, turning in his partner’s hold to press his lips to Donnie’s neck and sigh sleepily, “We’re doing that again sometime.”
The genius dropped a kiss to his head, “I’ll do anything you want me to do, Sugartail.”
The slider hummed, “How about a bath?”
“Sounds good to me.” And just like that, he was lifted, carried to the bathroom, and deposited on the counter with a kiss while his love started the tap.
He watched as Donnie padded over to the cabinet, still completely bare and looking absolutely edible, and reached inside for their bath soaps, “Lavender, eucalyptus, or jasmine?”
When Leo didn’t answer, he turned to question him and the words seemed to die on his tongue as he took him in, “Nardo?”
The slider smiled fondly, wholly enamored by the purple turtle he had the pleasure of calling his, “Lavender, please.”