Human relationships can bring safety, security and love - but sometimes they can also be taboo. Witness a real-life "Lars and the Real Girl" relationship, when a man in the United States falls in love with a sex doll. In Australia, meet a couple who stay faithful by having sex with strangers. In poverty-stricken Nepal, innocence is lost when a 7-year-old child is sold as a bride. Then, in the United Kingdom, a man defies one of his country's strictest taboos by marrying seven women.