Steve doesn't quite, entirely, consciously recognize that he's doing it, but once they're in the shop he sticks fairly close to Bruce - physically. He's not nervous or uneasy, but he is out of his element. Bruce is not. It's just natural for him to gravitate toward him just a little more than usual under those circumstances.

"I'm pretty sure I could buy a car for that much money," he pretty much murmurs. But: "I like it. I am assuming this is a scenario where trying it on is gonna need to be a thing?"

He has no idea how to navigate this.