At first, it was just curiosity. He wanted to see what Steve had been up to, at least, what he'd been up to after he woke up. So naturally, Bucky swiped his phone off the living room coffee table to investigate while his friend was off doing whatever in the other room.
The soldier could have just asked him, played twenty questions for hours, but there was always stuff Steve wouldn't want to mention. Anyways, it was easier and funner just to snoop. Especially if he found something embarrassing.
He slipped into the hallway, and started to look through the phone. He started with messages, and by the time he decided to just look through the photos; he could hear his friend trashing the living room looking for the “lost” phone.
He casually walked back into the living room, and leaned against one of the far walls, still idly flipping through the pictures while Steve proceeded to dig through the sofa.
That's when he found it.
Bucky's mouth fell open. That was....Oh my.
Oh boy, it couldn't get any better than this.
He turned his attention to Steve.
“Hey. You lookin' for this?”
He waved the phone at him with a huge shit-eating grin on his face.