I find flying interesting in that it's a very intimate experience. You're so close, physically, to one or two other people and you eat, sleep, do everything together. I've met the most extraordinary people on planes, some of whom I've stayed in touch with, some I haven't. Even if you're beside someone who ignores you for eight hours, there's a physicality you wouldn't put up with from anyone other than someone you knew well. You're in it together, even if you never say a word to one another.