We have all experienced nostaglia: a wistful desire for the happiness of a former place or time. Psychiatrist Marc Whaley and Psychologist Michael Abruzzese discuss the psychology of nostalgia. Once considered a disorder, the term was coined by a Swiss physician in the 17th century to describe a certain kind of homesickness among soldiers. Now considered a beneficial emotional experience, we look those benefits and how advertising cashes in on our memories of the past. Mindy Todd hosts this interview on The Point.