Cameron Diaz's Fountain of Youth Secret: “Lots of Sex!”

Cameron Diaz loves getting between the sheets as a form of staying healthy and in shape.

The actress – who has dated a string of Hollywood heartthrobs including Justin Timberlake, Jared Leto and her current rumored beau, Yankees slugger Alex Rodriguez – told the latest issue of British Vogue that getting busy, is important.

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"The fountain of youth, let's see. I guess it's exercise, healthy diet, lots of water, lots of laughter, lots of sex," the actress told British Vogue, according to reports. "Yes, sex, we need that as human beings. It's healthy, it's natural and it's what we're here to do."

The youthful looking 37-year-old also told the mag she has no plans to alter her natural appearance either.

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"I'm not doing anything right now," she said. "So far, so good. But I'll never say never to anything."

Cameron, a stunning California beauty, said she's happy the way she is.

"I might as well enjoy it while I've still got something," the actress told the mag. "You've got to be realistic. I don't want to look 25 again."

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Cameron returns to movie theaters opposite her "Vanilla Sky" co-star Tom Cruise in the action adventure "Knight and Day" on June 25.

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