We try to hold on to our youth, our money, our position, our loved ones.

我们尝试留住我们的青春、我们的金钱、我们的地位、我们爱的人。

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My youth. The harder I try to hold on to it, the more it just slips through my fingers. And all the makeup and dim lighting in the world can't seem to stop it.

我的青春。我越努力抓住它，它越迅速从我指缝中溜走。所有的化妆品和昏暗的灯光都无法掩饰。

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Yet it seems that banning or over-regulating this newest drug-of-choice is like trying to ban youth itself, or at least the universal desire to hold on to it.

CNN: WHAT VIAGRA CAN - AND CAN'T - DO

Kennedy's youth and charisma go far to explain his enduring hold on Americans and, indeed, people around the world.

NPR: 'Let Every Nation Know': JFK in His Own Words