What kind of people willingly break the law to let foreigners sleep on their couch for free? I tried to get the answer from these three residents of Myanmar. — One night, many months ago now, I was sitting on a bench outside a hostel in Battambang, Cambodia, talking with a young European couple. Like me, they were traveling, but they had made a rule for themselves: No paying for transportation or a bed. They would hitchhike and crash with…