What I really love about Chris Evans’ portrayal of Steve Rogers is such simple body language choices like the one above. In the top shot, he’s relaxed, at ease, talking business, which is fine.
But when Steve is confronted by an attractive woman making a direct move on him, he actually almost wheezes, like he would have done back in the day, trying to catch his breath.
He hunches up, folds down, retreating back into the shape of the “little guy”, because he isn’t used to being approached like this, and it kind of intimidates him a lot.
And that rubbing his forehead thing? That’s Steve’s anxiety tell. He does it a lot. Especially when he’s pushed into a situation where he’s incredibly uncomfortable and nervous and out and out panicking. He did it before Bucky threw him at his double-date.