Body language provides important nonverbal cues about interpersonal relationships and communication. Different cultures have different expectations of personal space, and invading someone's space can make them feel troubled, defensive, or aggressive. People often wear "masks" in public by putting on a certain face or mannerisms when in extended social territories like work. Careful attention to cues like eye contact, body positioning, and physical proximity can help understand social dynamics and prevent misinterpretation, but nonverbal signals can still be easily misread across cultures. The book argues that stripping away language can help reveal the true relationship, as words can obscure meaning, and misinterpreting body language poses risks like conflicts with peers or even legal trouble.