If you are flying in F class on BA or CX, not only will you not be "killing" yourself, you actually won't want to get off the plane.

Where else can you loaf in your pj's drinking unlimited amounts of expensive booze, eat all the food you want ("sir, are you sure you don't want another serving of caviar"), catch up on movies, be waited on hand and foot by a lot of pretty fine ladies and gentlemen and basically just lay around like a slug with no distractions??