Zerxus doesn't question sharing the blanket; he even makes it easier, helping Steve spread it over the both of them. It's been simple convenience, often enough, for everything from best friends to strained allies.

But he absolutely cannot hear that second part without quirking an eyebrow. "Well - "

Then, between one moment and the next, the remaining shreds of his armour are just gone. It would be very easy for Zerxus to take credit for that if he wasn't left baffled and blinking.