I don't understand anything.

This morning I browsed a gadget shop, a huge industrial warehouse of gadget limbs, eyes, hearts and other viscera, all hanging from shelves and hooks. I felt purposeful there-- but my affinity for these creatures continues to baffle me. I picked up an eye for a seeing-eye caterpillar, and felt great satisfaction when he revved back to life.

What is who? I've been trying to figure that out.