Proximity and the 'mere-exposure effect' play a significant role in the initial development of attraction and liking.

The mere-exposure effect, first extensively studied by Robert Zajonc, posits that repeated exposure to a stimulus (including other people) generally increases our liking for it, even in the absence of interaction. While not sufficient for deep connection, this principle highlights the importance of simply being present in shared environments—work, social groups, hobbies—where opportunities for repeated, low-stakes interactions arise. Greater proximity naturally increases these opportunities, fostering familiarity and comfort, which are foundational steps toward deeper connection.