ragman wrote :
You must not fly too often
that's true , i don't fly very often and when i do , i prefer to be "in a holding pattern" rather than using the toilets - particularly after a long overnight flight !
when we flew to europe during the 60''s and 70's , we usually flew with KLM . those were the days when everything was kept spotless - each toilet even had a large bottle of BOLDOT - a very nice dutch colongne .
breakfast was freshly scrambled eggs with HOT crusty buns - those were the days when flying was enjoyable - except for the smoking but some nice dutch genever and liqueur would make up for it - actually , KLM offered free smokes : cigarettes or cigars(to be smoked after the flight) .