I would question why the Captain felt it necessary to leave the Flt Deck so soon after departure, and to hand control to an inexperienced FO shortly before the aircraft reached cruise altitude. A "comfort break"? What are they talking about, I flew shorthaul for years and can't recall either of us being taken that short! Or ever 'going down the back' during the whole flight for that matter!
I flew shorthaul for years and
blah blah blah. So the Captain needed a wee, big deal, it happens. Are you suggesting that potential pilots must be able to display ultimate bladder control before being issued a license. What a weapons grade nutsack!