and found 85 percent of people believed extramarital sex was "always" or "nearly always" wrong. Much of the disapproval is attributed to "religious and moral reasons." A few studies have shown more direct disapproval of open marriage. In a national study of several hundred women and men, Hunt (1974) reported that around 75 percent of women and over 60 percent of men agreed with the statement "Mate-swapping is wrong." A 1975 study of several hundred men and women living in the midwestern United States found that 93 percent would not consider participating in swinging. A 2005 study asked 111 college women about various forms of marriage and family. These young women viewed open marriage as one of the least desirable forms of marriage, with 94 percent saying they would never participate in a marriage where the man has a right to sex outside the marriage, and 91 percent saying they would never participate in a marriage where the woman has a right to sex outside the marriage. Health concerns Engaging in sex with a greater number of partners increases risk of contracting sexually transmitted diseases. These concerns do not apply to open marriage alone, which would affect only 1 to 6 percent of the married population. A 1985 study found that 33 percent of male swingers and 10 percent of female swingers claimed to actively fear this risk. In another study, sexually transmitted diseases topped the list of disadvantages of swinging, and 58 percent of swingers expressed some fear of HIV/AIDS. Some couples have decided to drop out of open marriage lifestyles and become sexually monogamous in response to HIV/AIDS. The risk of sexually transmitted diseases can be greatly reduced by practicing safer sex. However, the percentage of people in open marriages who practice safer sex remains disputed. Anecdotal observations range from claiming no one at a swing event practiced safer sex to claiming everyone at an event practiced safer sex. A survey of swingers found that "Over 62% said that they had changed their behaviors because of the AIDS scare. The two most frequently mentioned changes were being more selective with whom they swung and practicing safer sex (e.g., using condoms). Almost 7% said they had quit swinging because of the AIDS epidemic. Finally, one third said that they had not changed any of their habits, and, of these respondents, more than a third said nothing, not even AIDS,