Airline Therapy - Cheap form of mental health where two or more unaquatinted people can chat and share their most personal thoughts with each other in the uninhibited environment of an airline flight. The fact that in 2-10 hours these two people are going to be going there separate ways, never to meet again, produces an uncommon candidness. With the advent of the internet this concept can also be applied to chat rooms & instant messenger.
The flight was a killer, however my seat mate provided 3 hours of the best airline therapy I've had in a while. It really cleared the cache. Do not confuse this with, "The Mile High Club".
I originally read about this in a USA Today Life article back in the early 1990’s. The article talked about the conversations that people have with total strangers on flights.