Disclaimer: I don't own "Project Blue Book" or any of the show's characters, wishful thinking aside.

Authors Note #1: Part 3 of the "Air & Opportunity" series. This snippet didn't fit into the main storyline, but I wanted to include it because this is a filthy home and ya'll just came in with your shoes on. This part fits in after the events of Part 1 & 2 as their relationship progresses.

Warnings: anal sex, animal traits and behaviors, drama, sexual content, romance, sexual tension, angst, period typical attitudes, canon typical violence, first time.

(In) Theory

Allen's eyes rolled back when he pressed into him for the first time.

Now, he'd always thought it was a figure of speech. That nothing felt that good. Nothing could make someone look like they were that gone that easily. But apparently, Allen was here to make an example out of his assumptions, as per usual.

They'd spent a long time figuring this part out.

Probably stalling, to be honest.

And why wouldn't they?

Setting out on the road less travelled was no small thing.

He wasn't a coward, but the slow turn onto this new road was more intimidating than he cared to admit. Allen felt it too. Maybe more than him sometimes. But that hadn't stopped them from pushing the envelope every time. They'd started small. Taking their time with it.

It had been different from what happened in the woods.

The kind of different that got embarrassed and confused. That got messy and awkward.

That had stops, starts and real-world hesitation. But it was still good.

And now it was happening, and Allen was-

"Michael..." Allen rasped, nails biting into the curve of his ass as he bottomed out. The stack of pillows under his back made him jack-knife. Almost fighting the burning pressure that was only just starting to feel good. "Oh god..."

They'd flipped for it, and he'd lost.

His compromise was wanting to see Allen's face.

Now he figured he might have over-estimated his staying power.

Because while his dick had gone soft at first. Flagging at the stretch and strange feeling of Allen pressing inside. Seeing Allen's face like that threatened to have him stiffening up all over again.

He bit his lower lip as Allen's chin dipped, eyes closed. The hands under his ass clenched. Wanting him closer. Feeling something electric hum through him when Allen shifted, then shunted up. So deep that the heavy smack of his balls brushed his ass.

Slick dripped down his crease. It should have been disgusting. And maybe it was. But he forgot to care when Allen's fingers drifted between his cheeks, rubbing the grease in thicker. Lingering around his hole until he realized what he was doing. Allen was- he was looking. Thumbing where he was stretched around him like he was in some sort of trance. Looking down at him, all red and ruined, like he was the most interesting thing in the world.

Holy hell.

"Come on, doc," he urged, needing more. Knowing if he didn't put a stop to it, they'd get stuck here. And maybe Allen knew it, because he spluttered a laugh. Neck and shoulders rash-red. Cracked lids showing off dark, blown pupils. "You're in the cockpit."

The chuckle quickly turned into a moan when Allen ground forward. Hiccupping a breath before pulling back. Pulling out. Making him twist and wince until Allen was pushing in again. Gathering all the air in his lungs and stealing it clean.

Oh.

Oh.

Yeah, maybe there was a reason people did this.

"What does it feel like?" he asked inanely, like his legs weren't thrown over the doc's shoulders, rocking with every shallow thrust. Cock starting to leak at the tip as it moved with them.

"Tight," Allen gritted, sweat darkening his temples. Apparently too busy to elaborate. The hollow of his hips echoing like a slap in the humid air of the bedroom. Making everything lewder. That much more perfect. "I didn't- I didn't think-"

And you know what? He got it.

"Y-You?"

He opened his mouth, trying to put it into words. But then Allen slammed in just right and he froze. Keening a sound he didn't realize came from him until Allen was kissing him. Frantically trying to chew it right from his lips as his hips kept the rhythm.

What the hell was that?!

"What- what-" he tried, as a bloom of bright hot pleasure rippled through him. His cock slapped tight against his belly. Drooling pre-cum until the next thrust milked an honest to god spurt from him. Dappling his skin with opaque white, just missing the Doc's thumb. "Oh fuck. What was that?!"

Allen groaned, shaking his head like he could clear it somehow. Sounding half-wrecked himself as he reared up and really put his back into it. Hitting that spot again, over and over. The one that made everything go quiet. Building like a supernova deep in his belly as he fisted his cock and held on for dear life.

"Something else I learned in the Encyclopedia Britannica," Allen laughed, bending to lick a stripe up his belly. "It's called the prostate. You might have heard of it."

He sure as hell had - during his yearly medical. But it hadn't felt anything like this.

"Again," he demanded. Cock blurting messily until sloppy pearls were trickling down the sides. Feeling more like his orgasm was being milked from him as he cussed a blue streak. Putting his hips into it. Watching the strain on Allen's face run deep as the man kept moving. Absolutely nailing that spot like he had everything about him memorized.

Because of course he did.

Maybe he didn't mind losing that bet after all.


A/N: Thank you for reading, please let me know what you think. – This series is now concluded.