His outlook on life was youthful, and he kept that youthfulness alive throughout his life, even during his suffering.

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Mr Trevidic says he has been surprised by the youthfulness of some of those involved, with some aged only 16 or 17.

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Being hairless has become identified with the idealization of youthfulness, explains Professor Susan A. Basow, head of the psychology department at Lafayette College in Easton, Pa.

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Although Ms Palin's youthfulness, she is 44, is an eye-catching contrast to the top of the ticket, questions will be raised about her ability to run the country if Mr McCain should ever be incapacitated.

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But many metro areas that are usually associated with youthfulness and aspiration are producing fewer children, including Los Angeles (sixth place on our list of baby bust cities with a decline of 12.4%), New York, NY-NJ-PA (eighth, down 7%) and San Francisco-Oakland (16th, -2.7%).

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"We created an outlet for them to feel good about themselves and tap into that youthfulness that had been put to bed for a long time ... you may be 40, but the euphoria of it makes you feel 14 all over again, " Wahlberg said.

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