Stefanie Stahl is a German psychologist and was born in Hamburg, Germany, where she grew up. She studied psychology at the German University of Trier. Since 1993 she has had her own practice in Trier, where she works as a psychotherapist and gives seminars in the German speaking area. Stefanie Stahl is the German psychological expert on commitment phobia. She is a bestseller author of advice literature on subjects such as partnership, (re-)building self-esteem, and commitment phobia.