[Diamond looks delighted by the answer anyhow--They really do love humans, they're all so cute! But as Sanzo continues, Dia just looks surprised]

Is it? [Rare and precious? They feel--and look--inexplicably embarrassed by that, smiling sheepishly]

Umm... I'm afraid I don't really know. I don't have any, umm... Biological anything. I can't eat or drink, and I don't really feel cold or heat. I can't feel pain, either, and I don't breathe or bleed. [They tilt their head, expression faintly amused] You humans have quite a lot to worry about!