In his new memoir, "If You Would Have Told Me," John Stamos is opening up about his past romantic life like never before, including stories about Rebecca Romijn, Paula Abdul and Heather Locklear. He also reveals what happened offscreen with his former onscreen wife, "Fuller House" co-star Lori Loughlin, writing that earlier in their careers, they had a date at Disneyland. "If You Would Have Told Me" is available now.