Tweets, Facebook status updates and personal blogs now make it possible for our friends and followers to instantly know the most intimate details about our lives. Have we become a culture of narcissists, uninhibited over-sharers? Temple organizational psychologist Donald Hantula joined "Radio Times" to discuss why people share personal information online. "We have been sharing information about ourselves since there were two of us on Earth," Hantula said. "We are very social creatures.…This is just an extension of what we've been doing all along."