It's one of the weird dichotomies of being Erwin Smith that he's dealt with ever since he hit puberty and shot up six inches over four months: Erwin knows he's physically attractive, but also knows that once people get to know him they shy away. He can't blame them; with his dedication to the Survey Corps and the things he's done in the name of freedom, he understands people wanting to keep their distance. So while he knows he's hot and has used it to his advantage wherever and whenever he's had to, he also knows that it's a mirage, hiding something much uglier underneath.

The wild thing is that Levi knows exactly what's under the attractive veneer--or at least knows it better than anyone else, has seen parts of Erwin he's refused to show anyone else--and likes him anyway. Levi knows he's a monster and still agreed to marry him. Maybe that means Levi is fucked in the head, or that Erwin is the luckiest guy in the world. Maybe both. The point is, Erwin knows he's hot, but he's never felt hot, not until here in the Labyrinth, with Levi curled against him and groping at his chest.

Erwin feels Levi's thighs tightening around his hips, and he involuntarily cants them forward, pressing into Levi's warmth and solidity. When he does, he jabs Levi in the thigh again, and this time it's hard enough that Erwin realises what's going on below his belt.

He goes still, breaking off their kiss and leaning back to look down between them, like he needs a visual cue to really believe what's going on. Yeah, that... that certainly is a thing.

"Huh." He glances back up at Levi, his brows drawn in slightly, his lips pursed. "Didn't realise that soldier was back from leave."