The mere exposure effect is a psychological phenomenon in which people tend to develop a preference for things or ideas simply because they are familiar with them. This means that the more we are exposed to something, the more we tend to like it. For example, if we hear a song repeatedly, we may eventually come to enjoy it more, even if we didn’t like it at first. The mere exposure effect can also apply to people, so the more we see someone, the more we may come to like them. This effect is thought to be related to the concept of familiarity, which can breed liking.