Have you ever googled something that you would never dream of saying out loud to another human being? Many of us turn to Google when we have a deeply personal or embarrassing question. And we're often more honest when we type our questions into search engines than when we answer surveys or talk to friends. Seth Stephens-Davidowitz, a former data scientist at Google, says our online searches provide unprecedented insight into what we truly think, want, and do. This week on Hidden Brain, what big data knows about our deepest thoughts and secrets.