when u take aeroplane, the pretty air hostess usually give u a hot towel to wipe your face....
have u tried taking the hot towel n then wrapping it around ur dick n masturbate? on board the plane i mean... fantasize about the chio air hostess
can try using the pillow or your bag to conceal your dick so that no one sees u...
then u orgasm n cum on the towel n then later u return the towel back to the chio air hostess n smile at her