It's one of life's strongest drivers and greatest mysteries, the source of terrible distress and sublime ecstasy. Why do we judge some expressions of sexual desire as eccentric but within normal bounds, and condemn others as repugnant and dangerous?
Addiction expert Dr John Marsden likes a drink. But his father was an alcoholic and although he has taken the decision to allow himself to enjoy drinking, he is obviously conscious of having inherited his father's genes. Combining his powerful, personal story with his specialist knowledge, Dr Marsden witnesses psychological and neurological experiments, meets cutting edge scientists and undergoes a rigorous medical analysis to discover the effects of drinking on his own health, all in search of the truth about alcohol.