Actress Angelina Jolie feared for her life following a dangerous sexual experience as a teenager. The Tomb Raider star and her then boyfriend introduced knives into the bedroom - and it almost had dangerous consequences. She tells Cosmopolitan magazine, "My S+M lifestyle was dangerous. My then-boyfriend and I used knives on each other. I was 14 and wanted to break out. I didn't tell anyone about it; it was a dark secret. "But I've since been more careful with things like that."