Hey sorry I didn’t realize you had replied but not established relationship ones but yeah like ones where they know that they have feelings for each other that aren’t unrequited. Also do you know of anything where they bond over books. I think a really cool part of their relationship is that they challenge one another intellectually. And I’d be kind of cool if they had debates about pride & prejudice or something. Sorry that got a little rambly. 😊

I don’t know very many like that exactly, but here are some ideas for you featuring smart Steve being a turn on for Tony (and one bookworm!Steve).  I love smart!Steve, so if anyone has other recs, please add them:

NO DEBATE ABOUT IT, LEAVING COMMENTS AND KUDOS IS THE BEST WAY TO GO!

Lending Libraries, or a Bibliography of the Avengers Initiative by northatlantic:
Steve was always a bookworm. That hasn’t changed.

(this is largely phil/clint with pre-Stony)

Statistical Mechanics and Mathematical Immersions by antigrav_vector:
Steve pinpoints one of Tony’s kinks and takes shameless advantage.

(Smart Steve does the science & math talk)

Five Times Steve Played Dumb and One Time He Didn’t by antigrav_vector:
Steve’s absolutely hopeless with electronics. He can break anything.

A Fire to be Kindled by keptein: It makes perfect sense, of course. The serum gave Steve
the perfect body, so why wouldn’t it also give him the perfect mind? In
the quietness of his own mind, Tony can admit he’s a little stung Steve
didn’t tell him, but he’s not really surprised.(Or: the one where Steve is smarter than Tony, and neither of them deal well.)

Challenge by JuniperLemon:
Steve is a genius and needs something to occupy his mind so he turns to
hacking and setting challenges for The Avengers. Iron man is out to stop
him.

Science and Progress (do not speak as loud as my heart) by sirona:
Steve’s body is not the only thing affected by the Super Soldier Serum.