I know this because I've traveled a lot and I've met people who are great at it. Real naturals. I've met travelers who are so physically sturdy they could drink a shoebox of water from a Calcutta gutter and never get sick. People who can pick up new languages where others of us might only pick up infectious diseases. People who know how to stand down a threatening border guard or cajole an uncooperative bureaucrat at the visa office. People who are the right height and complexion that they kind of look halfway normal wherever they go--in Turkey they just might be Turks, in Mexico they are suddenly Mexican, in Spain they could be mistaken for a Basque, in Northern Africa they can sometimes pass for Arab . . .

I don't have these qualities. First off, I don't blend. Tall and blond and pink-complexioned, I am less a chameleon than a flamingo. Everywhere I go but Dusseldorf, I stand out garishly. When I was in China, women used to come up to me on the street and point me out to their children as though I were some escaped zoo animal. And their children--who had never seen anything quite like this pink-faced yellow-headed phantom person--would often burst into tears at the sight of me. I really hated that about China.

I'm bad (or, rather, lazy) at researching a place before I travel, tending just to show up and see what happens. When you travel this way, what typically "happens" is that you end up spending a lot of time standing in the middle of the train station feeling confused, or dropping way too much money on hotels because you don't know better. My shaky sense of direction and geography means I have explored six continents in my life with only the vaguest idea of where I am at any given time. Aside from my cockeyed internal compass, I also have a shortage of personal coolness, which can be a liability in travel. I have never learned how to arrange my face into that blank expression of competent invisibility that is so useful when traveling in dangerous, foreign places. You know--that super-relaxed, totally-in-charge expression which makes you look like you belong there, anywhere, everywhere, even in the middle of a riot in Jakarta. Oh, no. When I don't know what I'm doing, I look like I don't know what I'm doing. When I'm excited or nervous, I look excited or nervous. And when I am lost, which is frequently, I look lost. My face is a transparent transmitter of my every thought. As David once put it, "You have the opposite of poker face. You have, like . . . miniature golf face."

And, oh, the woes that traveling has inflicted on my digestive tract! I don't really want to open that (forgive the expression) can of worms, but suffice it to say I've experienced every extreme of digestive emergency. In Lebanon I became so explosively ill one night that I could only imagine I'd somehow contracted a Middle Eastern version of the Ebola virus. In Hungary, I suffered from an entirely different kind of bowel affliction, which changed forever the way I feel about the term "Soviet Bloc." But I have............