 I was flying alone on an airplane recently, and you should know I am a head-down traveler. I put my earbuds in, I put my head down, I don't necessarily want to talk to my seatmate, which I know makes me sound like a snob, but it hurts my neck. So as soon as I get there, I try to put off the vibe, I don't want to talk to you. And on this particular flight, the woman next to me...