This is supposedly how a clockwork automaton "registers" her new master. Seems like an awfully "wet" procedure for something made of gears and light lubrication.
RyuZU the automaton keeps accusing her master Naoto of having a dirty mind. We know who has the dirty mind, right?
RyuZU finished off the suggestive registration procedure. What a coincidence! I just finished watching any more of this terrible show.