Human interaction is controlled by how we perceive each other. Smells play a subtle but significant role in this because they provide the background against which we interpret other sensory stimuli. In this symposium, we will clarify the social aspects of chemosensory perception: How are body odors perceived? How do body odors transport familiarity and closeness? And how are body odors in various states emitted? The aim of the symposium is thus to trace the sender-receiver chemosensory interaction.