"I assumed, from your lofty words, you had experience in this area."

Levi's face is warm. He fumbles with the emotion before identifying it—humiliation.

It's not the first time Erwin has humiliated him. Though—it's never happened in Erwin's bedroom before.

He thought, given the easy way Erwin's mouth coaxed climaxes from him, returning the favor would be child's play. No more difficult than "slaying" a wooden Titan in training. He simply had to follow the cues.

The trouble was that Erwin gave no cues. No sound—of pleasure or otherwise—passed his lips, and his face never gave anything away. Levi strained his eyes trying to catch a glimpse, a hint, anything.

While Erwin's dick isn't inhumanly large, Levi's mouth is considerably smaller than average. Just taking the full length into his mouth without choking, and remembering to breathe, was a challenge on its own.

Then there was the chore of keeping his jaw open, almost unhinged like a snake, without letting it snap back into place. And on top of that, Levi had to coax pleasure from Erwin's dick using nothing but what he had in his mouth.

His tongue never had any practice with that. It's good with insults. Threats.

But pleasure?

He fumbled and choked and dribbled saliva down his front and generally forgot to perform any artful motions that would wring a climax from the man hovering over him.

To make matters worse, Levi on his heels was too short for proper dick-sucking height. He had to hover, resting his full weight between his heels and his knees, creating an…interesting endurance workout for his legs. His neck developed a crick from straining forward for so many minutes on end.

He struggled for an excruciating, interminable amount of time, before Erwin squeezed Levi's neck and withdrew his cock without finishing.

Levi has collapsed back on his heels while Erwin has seated himself on his bed, pants still undone, his glistening, reddened cock peeking from between his legs.

"Did you mean to use so many teeth? It's certainly an unorthodox approach."

Levi shifts uncomfortably. It wasn't like he bit the man's dick off.

"'Course," he mutters, eyes darting to Erwin's before looking away again.

"I'm not opposed to pain. I can't deny it's brought me to climax in the past." Erwin sizes up Levi's pitiful, crumpled form. He lifts his chin, beckoning Levi closer.

Levi isn't sure whether to stand or remain on his knees. He half crawls, half walks to the foot of the bed where Erwin is seated. Erwin touches his cheek, hooking his thumb between Levi's lips, and guides him back to the floor.

Levi glowers at him. Can't the man just tell him he's fucking awful at blowjobs and kick him out? What's with this drawn-out torture session?

"I suppose I should've started easier. Given you a finger or two. Get you used to it."

Levi grunts in annoyance. "Don't have to treat me with kid gloves," he mumbles. Mumbles, because Erwin has fitted two fingers between his lips and is beginning to massage his tongue.

"Forgive me," Erwin continues, as if he hasn't heard Levi. "I simply assumed, given how dirty your mouth is otherwise, it must've had a man's cock in it by now."

Maybe I just didn't like the taste, Levi retorts. Silently, because Erwin's fingers have spread like scissors in his mouth, swirling around his tongue and teeth.

It is true, though—Levi dislikes the taste of flesh on his tongue, especially the musky, heavy flesh of Erwin's cock.

Just one more thing he has to get used to.

Erwin strokes Levi's hair with his free hand. "I expect the best from you, Levi. But you can't achieve your best with no guidance. It was my error."

Levi catches Erwin's finger between his teeth and bites down. Not hard enough to break bone, maybe not even to break skin, but enough to convey his displeasure.

If there's one thing he hates more than being used, it's being mocked. Although Erwin does both to him—the only person Levi can allow to do so—Levi can still protest against it in some small way.

Erwin's eyes crinkle. "I'm not mocking you." His hand moves from Levi's hair to his neck. One of the bastard's gigantic hands would be enough to wrap around his throat and choke him, Levi notes idly.

Amazing how, a month ago, this would've been cause for concern. Vigilance. Defense. Now, it's something Levi simply notices. Without alarm, without caution.

He now trusts this supercilious bastard to not choke him with one hand.

At least, not without good reason.

Erwin places his palm on the side of Levi's neck, fingers wrapping around the back, where they graze the bottom of his undercut.

"Show me you're worthy of that filthy mouth." As he speaks, he places a third finger between Levi's teeth. His hand tightens around Levi's neck when Levi instinctively shies away. "Use your tongue. It's a paintbrush, and I am your canvas."

His fingers move back and forth, simulating the thrusting motion of hips. Levi gags almost immediately when they stray too far down his tongue.

"Breathe, Levi."

Levi stills. He inhales deeply through his nose, valiantly ignoring the bead of saliva building at the corner of his mouth. Meanwhile, he flicks his tongue over Erwin's fingers, cringing inwardly at the taste.

Erwin's thumb traces his lips. His expression remains infuriatingly neutral—no smile, no frown. Not even a twitch of his ridiculous brows to indicate how Levi is doing.

Levi raises his eyebrows, a question. Erwin simply adds a fourth finger.

Levi's eyes water. He reminds himself to breathe.

Erwin maintains his rhythm for a few minutes more, long enough for the bead of saliva on Levi's lips to spill over and decorate his cheek and chin and neck.

He flinches.

Erwin finally pulls his fingers out, covered in spit that's mere shades away from bile. He makes no motion to wipe it off, shows no visible disgust or discomfort.

Levi, however, shudders at the collection of stringy saliva hanging from his mouth. He feels like an animal.

"How—" he clears his throat, attempting to loosen his hoarse vocal cords. "How did that help at all?"

Erwin moves his other—saliva-free—hand from Levi's neck to his cheek. "Practice." His thumb skims Levi's lips, his eyelid, his brow. "You'll get lots of practice."

"You'll get lots of bite marks," Levi mutters in warning. Just because he is Erwin's now doesn't mean he has to like every second of it.

Erwin looks truly taken aback for a moment—before he laughs, a light but genuine sound. "You truly do know nothing, do you."

Levi's face burns. He knows Erwin can see the flush on his pale cheeks.

"Oh, Levi. You are a wonder."