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December 19, 2008 3:45 PM

Holiday sex: Christmas season is peak for mating

The Christmas-New Year's period produces a year-high spike in sexual activity and conceptions in the U.S., according to biorhythm researchers and makers of sex-related products. They attribute the increase to holiday leisure and New Year's resolutions to have children. New Year's irresolution fueled by alcohol and partying is another contributing factor.

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