This volume offers an exploration of sex differences in how men and women communicate, set within the context of sex similarities so as to provide a balanced examination of the topic. The contents frame the conversation regarding the extent to which sex differences are found in social behaviour, and emphasize different theoretical perspectives on the topic. Chapter contributors examine how sex differences and similarities can be seen in various verbal and nonverbal communicative behaviours across contexts, and focus on communication behaviour in romantic relationships. The work represents recent research on the topic across various disciplines, including communication, social psychology, sociology, linguistics, and organizational behaviour, by scholars well known for their work in this area.