Why are we attracted to some people and to not others? Mike Williams explores the factors that lie behind our feelings of attraction. He speaks to the authors Christy and Clare Campbell. Christy fell in love at first sight, but it took Clare six months to feel that strong sense of attraction. After 40 years of marriage they are still attracted to each other.

Beauty, facial symmetry, personality and values all play a role in our attraction to others. Evolution biologist Dr Anna Machin from Oxford University explains the science behind attraction. Dr Machin explains how chemicals released in our brains gives us the confidence to approach someone who we are attracted to and how the smell and taste of a prospective partner can tell us a lot of their genes and whether they will be a compatible mate.

(Photo: A couple gazing at each other. Credit: Shutterstock)