In the study of human behavior, it's basically accepted that when left to their own devices individuals gravitate towards things that are familiar to them. Commonality in class, education, race and skin color, and income all influence many of the decisions that we make and those we choose to be with.

That idea also extends to the realm of facial recognition. And a new study indicates that those who observe and come into contact with a wider range of different faces are more prone to instantly "like" (accept) an unknown person based solely by their facial features.

More specifically, the wider your exposure to many different types and shapes of faces -- which, in turn, defines a person's idea of an "average" human face -- the greater the chances that "you like faces that...