Bestselling author and psychologist Dr. Kevin Leman talks about his books "Growing Up Firstborn" and "Unlocking the Secrets of Your Childhood Memories." His controversial advice includes not making oldest kids babysit, giving the oldest special privileges, and that opposites should attract in marriage. He also evaluates childhood memories of successful people, including Donald Trump. From 1990 on WHO radio in Des Moines, Iowa. "Winzenburg on the Weekend" is available on all major podcast services.