That made him shudder all over. Not displeased, just--deeply affected by the touch. That single eye was the most dangerously powerful part of him. Also a vulnerable part--if anything ever took it from him, after all, he would be totally blind, and even the mokuton would not be much use then. He reached and touched Itachi back very lightly, just on the side, almost like he was checking that he was real. "Yes," he agreed. "Some of me remains."