This document discusses concepts of personal space, privacy, territoriality, and their implications for design. It outlines 4 distance zones - intimate, personal, social, public - and defines privacy as an individual's control over interactions. Privacy can include solitude, intimacy, anonymity, and reserve. Crowding can lead to negative behaviors from a lack of control and social overload. Design should account for differing privacy needs based on personality type, stress levels, and culture. Territoriality involves psychological identification with and defense of personal space. Soft architecture allows personalization without permanent changes.