Most of us could probably put together a list of things we find attractive in a potential partner and a lot of those things will likely come down to our personality or the cultural environment.

But what about that initial, almost unconscious, spark of attraction? What causes that and does it have any real impact on whether a relationship with that person will stand the test of time?

Paul Eastwick is a Professor in the Department of Psychology at the University of California, Davis, and Head of the Attraction and Relationships Research Laboratory - he joins Jonathan to discuss.