Doc Daneeka hated to fly. He felt imprisoned in an airplane. In an airplane there was absolutely no place in the world to go except another part of the airplane. Doc Daneeka had been told that people who enjoyed climbing into an airplane were really giving vent to a subconscious desire to climb back into the womb.
-- Catch-22 by Joseph Heller
What about the enjoyment of crawling into a warm bed?