[His limbs are very much human-shaped, at any rate. But she might feel how instead of muscle and sinew, Connor's arms seem to be made of something more... solid. Like hard plastic or other man-made parts, despite their normal look.

As for the gesture itself, Connor is briefly surprised, looking at her with a blink. He doesn't pull away, though.]

No. Preferably they'll never just 'fall off'. But in case of injury, or anything else unexpected, it's best to take extra measures. Don't you agree?