Jeremy Dean writes "Once past saying 'hello' and 'how are you?' to someone you've just met, what is next? How do we make friends and get to know other people? Psychologists have talked about the importance of body language, physical appearance and clothing but they've not been so keen on what we actually talk about. A recent study put participants in same-sex and opposite-sex pairings and told them to get to know each other over 6 weeks (Rentfrow & Gosling, 2006). Analysing the results, they found the most popular topic of conversation was music. What is it about music that's so useful when we first meet someone and what kind of information can we extract from the music another person likes? "