You’re sitting with Bucky in the Avengers compound’s common room, late at night. Most of the team’s asleep, and the movie you two were watching has long ended. The faint light from the TV flickers across his metal arm as it rests on the back of the couch, gleaming in the dim room.

You glance at his vibranium arm with a teasing smile. “So, Bucky… I’ve gotta ask you something.”

Bucky raises an eyebrow, the corner of his mouth twitching into a smirk. “That tone doesn’t sound good, doll. Should I be worried?”

You laugh softly, leaning closer. “Maybe. Depends on how you answer.”

He leans back, eyebrow still raised. “Alright, shoot.”

You try not to laugh. “Does… your arm, y’know… vibrate or something? I mean, it’s Stark tech, right?”

Bucky freezes for a second, blinking before letting out a low chuckle. “You’ve been spending too much time around Tony, haven’t you?”

You grin, shrugging. “It’s a valid question! I mean, it is metal.”

Bucky leans in, voice dropping a little, teasing right back. “It’s more than metal, doll. But you’ll have to trust me when I say—it’s got a few tricks up its sleeve.”

He smirks, his tone and gaze almost challenging.