Scott has a way of making stuff so mundane and simple, and stating the obvious, and even on his worse days, he makes Bucky laugh, reminds him that real life exists outside of trauma and war, and Bucky adores him. Luckily, Scott is totally swayed by Bucky's pretty eyes and goofy smile and dry humour. Score.

Bonus: Bucky is also super petty, though, and willing to fuck Scott where he knows Sam will hear, just to annoy him. Scott may or may not know about that part.

("OH MY GOD AGAIN??? THAT'S THE THIRD TIME TODAY, GET OFF HIM BARNES!")