[ the only reason steve does not actually run out to the fire escape is because if he does he will be tempted by the very juvenile impulse to actually bite bucky. he's being mature, he's an adult who's in control of his impulses and who can delay gratification!!!

when he finally sticks his head out the window to see bucky, the impulse to bite is mostly gone. mostly. ]

You know we keep an industrial vacuum in the apartment for exactly this? Get in here, I'm getting cold just looking at you.