What can twins (identical, fraternal and virtual) teach us about the roles of genetics, lifestyle, environment and sociology in terms of 'who' (and how) we become? Professor Nancy Segal is an internationally-renowned researcher, academic, author and speaker, who's appeared on Oprah, CBS Sunday Morning, the Martha Stewart Show, Good Morning America, 20/20, Discovery Health and countless other national and international shows. And now, at the pinnacle of her media career, she chats with the sweary Bogan from Bayside Melbourne. Enjoy.