The largest group, at 46.2 percent, said their partners experienced only a little jealousy.The remaining 30.8 percent said their partners experienced moderate to extreme jealousy.Most of the book describes approaches to revitalizing marriage in areas of trust, role flexibility, communication, identity, and equality.Chapter 16, entitled "Love Without Jealousy", devoted 20 pages to the proposition that an "open marriage" might possibly include some forms of sexuality with other partners.Open marriage is usually defined in terms of legally married, opposite-sex partners.
A person of the opposite sex would not compete in this way, satisfying a different set of needs for their partner." (Weinberg, Williams, & Pryor, 1995, page 108) People who experience normal jealousy have at least nine strategies for coping with jealousy.The ground rules adopted by sexually monogamous couples tend to prevent behaviors that are viewed by the participants as acts of infidelity.The ground rules adopted by sexually open couples tend to prohibit behaviors that provoke jealousy or sexual health concerns.Studies and articles that interview individuals without taking their married status into account may not receive accurate information about the actual "open" status of the marriage. (Blumstein & Schwartz, 1983, page 287) Couples may have an open marriage in principle, but not engage in extramarital sex.Blumstein and Schwartz asked more than 6,000 couples whether or not they had an understanding allowing sex outside their relationship. Studies that define open marriage by agreement alone will tend to report a higher incidence than studies that define open marriage by agreement and behavior.