German researchers studying the evolutionary aspects of sex found that 60 percent of thirty-year-old women desire frequent sex with their partners at the outset of a relationship; within four years, however, fewer than half do, and after twenty years only about 20 percent want regular sex. | Harper's Magazine

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German researchers studying the evolutionary aspects of sex found that 60 percent of thirty-year-old women desire frequent sex with their partners at the outset of a relationship; within four years, however, fewer than half do, and after twenty years only about 20 percent want regular sex.

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German researchers studying the evolutionary aspects of sex found that 60 percent of thirty-year-old women desire frequent sex with their partners at the outset of a relationship; within four years, however, fewer than half do, and after twenty years only about 20 percent want regular sex.

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