Hugh Hefner once had a gay romp

London, June 25 : Hugh Hefner is so addicted to sex that he once had a gay tryst, according to a new tell-all book.

In "Mr. Playboy: Hugh Hefner and the American Dream," writer Steven Watts has revealed some shocking sexual escapades that Hefner experienced.

Watts reveals that the Playboy boss' "thirst for sexual experience" became so strong that he even had a one-time homosexual encounter, reports the Daily Express.

"One evening in downtown Chicago he was propositioned and, according to Eldon Sellers [a friend], he thought, 'What the hell. Found it an interesting experience,'" Watts writes.

The book also reveals that Hefner once enlisted his first wife Millie, his own brother Keith, and his wife, Rae for a foursome.

"It did happen with his brother, Keith, and his wife, Rae, one evening. [But] while Millie ultimately backed out of having sex with Keith, Hugh slept with his sister-in-law," Watts writes in the book.

According to Hefner, he gave Watts access to personal documents before he penned the biography, hailing its authenticity.

"This is the most authoritative book ever written about me... It's all essentially true," Hefner said.

The book is scheduled for release in October (08).

ANI