For many, the idea that being gay is not a choice is key to the fight for equal rights. Instances of homosexual behaviour in animals are used as evidence of the naturalness of being gay. Differences in brain structure between gays and straights are employed to further reinforce the idea that sexuality is innate. So what happened to the idea of choice in sexuality? Can gay rights only be secure if homosexuality is proven to be innate? Can sexuality be found in the brain, or do we have to look beyond our heads for the answer? Speakers in this Battle of Ideas discussion include Dr Ceri Parsons, senior lecturer in psychology, University of Staffordshire; Dr Qazi Rahman, lecturer in psychological sciences and directory of psychology programmes, Queen Mary University and Wes Streeting, head of education, Stonewall.