If he finds "peter wuz here" inside the panel of his foot he's going to be very displeased.

He obediently twists his arm as instructed, he's had years of being poked and prodded by Dr. O'Deorain who had a far worse bedside manner, so he's more than willing to show Peter how his arm works. "It goes up over my shoulder, to here."

Indicating a place on his chest with his other arm, he feels weirdly vulnerable here. Like he's telling someone his weaknesses, even indicating just how much of his arm is machine seems like admitting too much. But he's trusting Peter to not actually try and take him apart.

Synthetic impulses in his arm let his brain know what it's doing and control it, but he can't really feel anything with it. There's a phantom sensation, of touching things or being touched, but it feels subdued, not quite real. Or it's the complete opposite all pins and needles when he's fully aware of every bit of metal in him, every port and wire. Those days are the worst, and he can feel it in his jaw currently. He's been talking too much lately, and the chassis making up his mandible isn't pleased about it.

"Similar to what you have in your world?"