Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP
Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP

Playboy-type men have a higher risk of psychological problems, study suggests

Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP
Identical twins Karissa and Kristina Shannon, Hugh Hefner and Crystal Harris arrive at the taping of the American Film Institute Life Achievement Awards in Culver City, Californiam in 2009. Photo: AP
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