Becky Ripley and Emily Knight discover the hairy history of the human kiss. Where did it come from? Why do we like doing it? And how is it good for us?

Featuring Dr Adriano Lameira, primatologist turned evolutionary psychologist from the University of Warwick, and Dr Dean Burnett, neuroscientist, lecturer, and author of The Idiot Brain and The Happy Brain, among others. Produced and presented by Emily Knight and Becky Ripley.