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Marital coitus

The average frequency of marital sex reported by women was 2.8 times a week in the late teens, 2.2 times a week by age 30, and 1.0 times a week by age 50. Kinsey estimated that approximately 50% of all married males had extramarital sex at some time during their married lives. Among the sample, 26% of females had extramarital sex by their forties. Between 1 in 6 and 1 in 10 females from age 26 to 50 were engaged in extramarital sex. However, Kinsey classified couples who have lived together for at least a year as "married", inflating the statistics for extra-marital sex.