A few years ago, I backpacked through Southeast Asia with my best friend, Lauren. We started in Kuala Lumpur, and by time we parted ways in Ho Chi Minh City, we were in the throws of violent food poisoning and barely on speaking terms. I was exasperated that Lauren had no interest in decision making, and Lauren was stressed by my tendency to get an idea and spontaneously alter our plans. Our frustrations climaxed with a fuming argument on a public train over 35 Thai baht (roughly one U.S. dollar). Thankfully, we both see the humor in this now.