#Confession time (since I've been tooting here, a lot of sexual memories keep coming back to me, especially since I'm still trying to figure out when and how I started to become this hypersexual deviant):
I have never had sex on a plane, let alone on a chopper or, erm, a space ship (...), but, in all seriousness:
When I was 13 I had a (rather innocent, as my blurry mind recalls) orgasm on a (family) holiday flight.
I don't know for sure but it might have been in Greek airspace.