"I've been called worse than parasite," I said, returning her smile in kind, "but that is the best description. And that's how it's supposed to be. We're inserted into the host by a small incision in the back of the neck, or the closest facsimile, depending on the species. I'm really very small. My actual body would fit into your cupped hand. We have connections, antennae that extend out and attach to the brain and spinal cords, so we can move the body, see, feel, touch, hear. Experience."