I'm fascinated by all aspects of human attraction and have always been a firm believer in that attraction is a primal, chemical reaction. I remind my friends of this when they are frustrated by online dating. It is imperative to physically get in front of people and interact, not just flip through profiles, like perusing the phone book.
This TED Talk is about how our personalities are linked to brain chemicals, and how these brain chemicals play a legitimate role in who we are attracted to. Fascinating all around.