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It started as one moment. Dennis, already a little floaty from having his head manoeuvred back and forth between his partners, their hands on his jaw, as they kissed him, had finally been allowed to breathe. He was panting and his hands shook as he slipped off his (Robby's) shirt and (Jack's) shorts.
They'd done this before, had seen him like this before. Which is maybe why he is so taken aback when Jack coos.
"Aww look at our pretty puppy, Mikey. He's so little."
Dennis flushes, can feel the pink skin travel from his cheeks down to his chest.
"Don't tease the poor thing, Jack," Robby says, but he doesn't sound reprimanding. Not really.
Both men strip as they speak, helping one another with practiced hands and the sight alone is enough to really settle Dennis. Its a privilege to get a peak into just how interwind they are.
"You know I'm right," Jack insists. "Bet the pup has never even seen a cock like this."
He has. Has seen that exact cock enough times to remember it in his dreams. But it's like every word Jack speaks sends him sinking into this place where... maybe he hasn't. Maybe he still has so much to learn.
Robby huffs a fond laugh.
"Well I guess we better show him then," he says.
And then he presses his dick up against Dennis. So their tips met in a crude imitation of a kiss.
What the fuck what the fuck what the fuck.
Robby shifts so his dick slides higher, so they're flush against one another and Dennis can feel his hole flutter at the tease.
Now, Dennis has only been taking T in full doses regularly for a couple months. Before that, he didn't have the money nor the insurance but Robby and Jack insisted on taking care of it. All that to say, the effects aren't all that visible yet. But what Robby says next hits him like simultaneously the most gender affirming and hot as hell thing.
"See there, puppy? One day your dick might be just like this one. You just gotta keep growing big and strong, hm?"
It's all sugary sweet and dripping with condescension and Dennis thinks he might cum just from this. Just from the feeling of Robby pressed right up against him teasing him about how little his dick is.
Jack shifts on the bed next to them and then there are two dicks pressing into him. Practically hiding his clit between them. He feels them both throb and he knows this is doing it for them just as much as it's doing it for him.
"It's okay, sweetheart," Jack grins, teeth glinting. "We'll keep an eye on you. Make sure those puppy parts are working just as they should."
And they do.
Dennis will be minding his own business, reading a book, making a snack, listening to his music, when he'll be grabbed at the waist and stripped. Sometimes it's just Jack, other times Robby and often it's both.
One of them will hold him steady, hiking one leg up to give a better view, or petting his hair and hushing him as he whimpers. The other will pull his lips apart, dip just the tip of a calloused finger into his hole, testing, teasing.
"Still so tight, baby."
"What a good boy."
"Always so wet, aren't you?"
They'll coo.
Then they'll pinch and rub and tug on his little dick till he's fighting in their hold, desperate for more. Only that's when they'll stop, tuck him back into his boxers and pants and give him soft kisses till he calms down, flopping into their hold like they've already rung three orgasms from him.
It's the sweetest form of torture.
The worst is when he's just taken his shot (read: Jack or Robby has insisted on injecting it for him despite them all being literal doctors) and they know he's keyed up and horny.
It's the evening of one such day when he's brushing his teeth in the bathroom and Jack steps up behind him.
He's a little suspicious, but ultimately eased into a false sense of security when Jack just holds him, pressing a gentle kiss to his head.
Teeth brushed and face rinsed, they stand there a little longer, swaying slightly as they smile at one another through the mirror. Jack has his prosthetic on, all dressed ready to make his way to the Pitt once Robby and Dennis are in bed, and Dennis sinks into his strong hold. He knows moments like these are good for the both of them, when they'll have to be apart for the next batch of shifts.
Only.
With another kiss, this one on Dennis's neck, Jack's hands find his waistband. Dennis can't take his eyes off the man in the mirror. Slowly, his underwear is pulled down and Jack chuckles at the significant wet patch at the crotch already.
"Needy boy," he hums.
He pulls up Dennis's shirt to get a better look, then places it in the boy's hands for him to hold. A squeeze to Dennis's waist tells him without words to stand still, as Jack zips down his jeans and pulls them and his boxers down just enough to pull his dick out.
The most mortifying (unfairly sexy) part is, Jack isn't even hard. And the sight of his soft dick sliding between Dennis's legs so he can measure them up is enough to have Dennis moaning like a whore.
"Mm, I think you're growing a little big guy," Jack says, and fuck he sounds proud.
Dennis isn't going to survive this.
Jack tucks himself away again and then slides Dennis's briefs all the way off.
The shirt he's wearing goes down to mid thigh so he's covered when he lets it go, but they both know what's underneath.
He shivers.
"Go sit on your Daddy's lap," Jack instructs. "He'll be more than happy to give you a treat."
Dennis will not discuss how quickly he hightails it into the bedroom. Or how Jack's laughter following him stokes the fire in his belly even more.