If you have a dating app on your phone, listen up. Doctor Robert Huizenga has worked with celebrities, athletes and TV dieters.SAN FRANCISCO (KGO) -- If you have a dating app on your phone, listen up. Doctor Robert Huizenga has worked with celebrities, athletes and TV dieters.But he stopped by ABC7 News to talk about something different -- relationships. He has a new book out called "Sex, Lies & STD's."You can order the book on Amazon here.For more stories, photos, and video on books, visit this page. Report a correction or typo