As we get to know other people, we gradually filter them into distinct boxes or categories. Some we associate with work, recreation or competition. One particular social category worthy of further examination is the idea of a best friend. What makes someone a best friend? Is this title always applied mutually between or among groups of friends? How do these particular individuals shape our lives and growth. This week, we're joined by Jack Quigley to examine how we choose or evaluate friendships that may fall under this label. How do our preferences for best friends change as we grow older?