I am not in agreement with this strolling and parading yourself in the cabin. If your are part of a 2 man crew it's a no no IMHO, Barring the call of nature of course but don't loiter. You only need something to go wrong at the wrong time and things could get ugly, very quickly, if not dealt with by the designated operating crew.
If said Captain is part of an augmented crew and playing at this, a pax my well think but not ask "who's flying the aircraft?" or "who is minding the shop?" while you are prancing around.
This "master of my ship mentality" is archaic and should be consigned to the scrap heap.