When your mind is elsewhere, your brain sits up all night like an anxious parent waiting for its wayward teenager to return. Where has that mind been? Who has it been seeing? I told it to be home by midnight. Did it get into trouble?
Perhaps some sort of mother/father left-brain/right-brain equation could be made, but studying bicameral consciousness at college was when my own mind began to wander, usually backwards in time.
What, for instance, it might idly speculate, would the ancient Romans make of boring old Professor Watkins? Crucifixion by Caligula, probably, or banishment to the furthest borders of the Empire under Hadrian. And I certainly wouldn't buy Watkins as a slave if Seneca put him up for sale in the Forum. His teaching assistant, Debbie, however, I'd put in few high bids for her. So that was how my young mind got into trouble when it was elsewhere.
Nowadays, my mind slips out the backdoor of my brain whenever I'm forced to listen to clients whine about the cost of work my company has done for them. And it travels not to the distant past but to the future, when I have retired and no longer need to care about such aggravating nonsense.
Unfortunately, that Stardate is so far in the future I imagine robot lecturers will be teaching Introduction To Psychology at the University of the Moon by then.