Can you not wait until you get to your hotel room? I mean most of it I can tolerate: holding hands, non tongue involved kissing. But when there is a make-out session, spit swapping, and heavy petting going on in the two seats next to me?!? Stop being filthy animals and wait until after the 4 hour flight to grope each other.
Airline travel has become far less appealing than it has even been in the past. From the bag fees, to long lines and expensive food it is a stressful hassle filled necessity that stands between you and your vacation. In Europe air travel has yet to turn so negative.