Obama's sex and drugs past laid bare in new biography

The sex secrets of the young Barack Obama have been revealed in an authoritative new biography of the ex-president.

Obama slept with his girlfriend Genevieve Cook on their first date, before she wrote him a poem about their 'f***ing' and called their sex 'passionate', the book about the former president reveals.

They also did cocaine together - and after they split she slept with his best friend.

Obama also considered a gay relationship while at college, twice proposed to another white girlfriend, and cheated on Michelle with his ex during the first year of their relationship.

His past is revealed in the 1,078-page biography Rising Star: The Making of Barack Obama, to be published on May 9.

Obama, a new Columbia graduate who was working for a firm that prepared financial reports at the time, made dinner for Cook at his apartment in Manhattan two weeks after meeting her at a New Year's Eve party and handing her his phone number.

It was the start of a relationship which is one of a series revealed in Rising Star.

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