I am so glad I have never flown in the airlines. You lot sound like you are right on the edge of killing each other! All this bull**** about buttoning up your jacket and when you shave and over managing the poor bloke flying the plane.
There are two pilots up front in case one dies. Redundancy, same reason why we have more than one engine. I expect to go to work, enjoy my day with whoever I am flying with, probably spend a week in a hotel somewhere, do a bit more flying, have a chat about life at some point, and generally find a way to finish batting through 25 years of flying. Why do people try to make this job difficult! Go to work, dont be a cock, go home. Its reaaly really simple.