How do you have sex on a plane without getting caught?

I've haven't joined the mile high club yet, but it's on my to-do list. The only place I can think of where you're going to pull this off is in the bathroom. The downside is that they are very small so there's not much room to get it on. Go the bathroom and then a few minutes later have your girlfriend come in. Keep the noise down or people will probably complain ;)

Did this with my then-girlfriend about 1.5 years ago. Here's some tips:

1. Do it at the beginning of the flight while the flight attendants are handing out drinks/snacks. Most guys wait til the movie, but then the flight attendants just chill at the back by the bathrooms.
2. Like Mike said, let her go in first and follow about 20-30 seconds behind.
3. Have it planned out. The bathrooms are TINY and if you spend more than 5 mins in there it gets suspicious. Reverse cowgirl was all we could really work in the space, and a condom is helpful.
4. Accept you're probably gonna get caught. That's half the fun anyways. And what are they gonna do, kick you off the plane? When we were done she left the bathroom, then I waited ~10 seconds and followed. There was an old man waiting when I walked out but the awkwardness was definitely worth it- you've done what most men can only dream of ;)

hope that helps. Good luck and godspeed ghostrider!