There are some titles you can earn that nobody can take away. If someone asks you what is the most kinkiest place you have had $ex, you can proudly say, at 30,000 feet in an airplane. On a contrary to a popular belief, pulling off airplane $ex does not require chartering a private jet or getting arrested when your flight lands. It's totally doable and to find out how, the flight attendents were asked the tips and suggestions.There advice was quite helpful and interesting.
Start an argument that instigates other person to get up and leave. The offended person leaves in a tear-filled huff and locks him or herself in the bathroom. The person who is now left gets up and bangs on the lavatory door to apologize. The person in the restroom opens the door and invites the other person in, so that the 'fight' can continue. Have a fake hate $ex while other persons still think you are fighting.
Book a red-eye flight. Nobody really gives a f**k on those flights. On a flight that doesn't typically sell out, select the aisle and the window seats of the same row. People usually do not select middle seats, so if everything works out, you may have a whole row to yourselves. Wait till the meal service has ended in the first class and the cabin lights go out. Watch the lights in front of the plane, if they go out too, that's your cue. Move under that blanket that you bought in your carry-on bag. "The seats are so cramped that you wouldn't believe the ridiculous positions people sleep in," said the flight attendants. Do it under the blanket. But quietly, people are sleeping/watching.
If you are traveling anywhere overseas, make it an overnight flight. The in-seat option is overruled because most international flights do not allow two people in three seats (what with their big center sections and pairs of double seats on each side). Wait for the flight attendants to take their break, that is after the first meal service. Again, cabin lights going out in front of the plane is your cue. Around three to four hours into the plane, people start falling asleep, and restrooms are empty, that's what you should wait for. Nobody really cares, as soon as you see one of the restrooms empty, make your move. Have a long discussion about your future as a couple or bang each other's heads, it's your call.