They were learning each other in a whole new way, they'd been friends before, best friends and so they weren't strangers. But they hadn't been lovers, Steve had never actually been with one person more than once, so it was a first and it was interesting how things seemed to get better and better. Which made sense because now Steve knew things he hadn't before, like that Tony loved when he was a little rough, or when he bit down on the side of his neck. Tony had always responded well to Steve's praise and now Steve knew the extent of it- well it only spurred him on.
Tony responded to the smallest touch and Steve was reluctant to stop touching him, but he did only because it made quick work of the last of his clothes. Everything was better when he could just focus on the man in front of him.
"Say it again, sweetheart," Steve said as he got his knees back between Tony's.