Is there such a thing as love at first sight? Is monogamy natural? And is there a time when you should just walk away? Laura Mucha has interviewed hundreds of strangers—from the ages of 8 to 95 in more than 40 countries—asking them to share their most personal stories, feelings, and insights about love and relationships. Drawing on psychology, philosophy, anthropology, and statistics, Mucha combines theory and everyday experience in an effort to better understand how love makes us think, feel, and behave.