Hey everybody,
I remember reading a fic where Steve was wanting to start entering the dating scene but he was nervous(?) because he knew he wasn't as experienced with sex. So Clint offered to teach him/help him out. Natasha "helps out" every once in a while. I believe it ends in Steve/Clint.
Thank you so much in advance!
ETA: The story is
Cart, Then Horse, found by
fiveforsilver.