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Prevalence

A 2005 survey of the U.S. Centers for Disease Control and Prevention found a rising incidence of anal relations in the American heterosexual population. The survey showed that 40% of men and 35% of women between 25 and 44 had engaged in heterosexual anal sex; in 1992 a similar survey found that only 26% of men 18 to 59 and 20% of women 18 to 59 had.^[10] By way of comparison, seven times as many women as gay men engage in anal intercourse, a figure reflecting the greater overall heterosexual population.^[11] Another survey in 2008 focused on a much younger demographic of teens and young adults aged 15–21. It found that 16% of 1350 surveyed had had anal sex in the previous 3 months, with condoms being used 29% of the time.^[12] However, given the subject matter, the survey hypothesized the prevalence was probably underestimated.

Figures for prevalence can vary amongst different demographics, regions, and nationalities. A 2001 French survey of five hundred female respondents concluded that a total of 29% had practiced anal sex, though only one thirhttp://freeporn.t.pl/

Figures for the prevalence of sexual behavior can also fluctuate over time. Edward O. Laumann's 1992 survey, reported in The Social Organization of Sexuality: Sexual Practices in the United States found that about 20% of heterosexuals have engaged in anal sex. Sex researcher Alfred Kinsey, working in the 1940s, had found that number to be closer to 40% at the time. More recently, a researcher from the University of British Columbia in 2005 put the number of heterosexuals who have practiced anal sex at between 30% and 50%.^[15]

According to Columbia University's health website, Go Ask Alice!: "Studies indicate that about 25 percent of heterosexual couples have had anal sex at least once, and 10 percent regularly have anal penetration."^[16]