[bbctol]

Perhaps we do! How do you know that your autonomic nervous system isn't consciously regulating your breathing, digestion, and heartrate, blissfully unaware of the less important unconscious processes that acquire food and move about. (I wrote a science fiction story along these lines once, that was described by readers as "uh... interesting, I guess.")

[bordercases]

Hell, I'd read it. Still kicking around a copy?