In modern Western cultures, social value of sexual abstinence before marriage has declined. Historically, a significant portion of people had engaged in premarital sex, although the number willing to admit to this was not always high. In a study conducted in the United States, 61 percent of men and 12 percent of women born prior to 1910 admitted to having premarital sex; this gender disparity may have been caused by cultural double standards regarding the admission of sexual activity, or by men frequenting prostitutes.