Dunno. I'm curious to find out.

[That's not just teasing if there's anything to go by.]

The one advantage is it doesn't exactly register pain; that's helpful, when it breaks.

[But it also means there's a lot of experimentation he wants to do. He's still trying to get used to the idea of using his metal arm as a limb, and not a weapon.

He uses his left thumb to rub against Steve's hand, smiling gently.]