is a book by communications expert Leil Lowndes that identifies 26 subtle non-verbal cues (the "U.S.S.") women use to indicate romantic interest. The core premise is that since society often discourages women from making the first move, they rely on "undercover" body language to signal a desire to be approached. Key Concepts and Signals
: Breaking eye contact specifically to perform an action (like applying lipstick) is interpreted in the book as an invitation.
: Beyond dating, some reviewers suggest the book provides a helpful foundation for understanding general human body language and social interactions.
