"Self-disclosure is extra rewarding, " said Harvard neuroscientist Diana Tamir, who conducted the experiments with Harvard colleague Jason Mitchell.

WSJ: The Science of Bragging and Boasting

Harvard neuroscientist Diana Tamir and her Harvard colleague Jason Mitchell conducted a series of experiments to explore why people like to talk about themselves.

FORBES: 'It's All About You!'

In fact, a battery of studies by Diana Tamir and Jason Mitchell of the Department of Psychology at Harvard University found that talking about ourselves lights up the same brain pleasure centers as food, money and sex.

FORBES: Talking About Yourself: The PR Impact