Scienceenvironment
Infants Perceive Saliva Sharing as a Marker of Close Social Bonds
Recent psychological research suggests that infants as young as a few months old possess a sophisticated ability to interpret social relationships. By observing interactions involving saliva sharing, babies can distinguish between close familial bonds and casual acquaintances. This innate social cognition helps infants identify who they can rely on for protection and care. Understanding these early developmental milestones provides deeper insight into how human social structures are formed from the very beginning of life.