In this society, It is usually assumed that one is either single or in some form of momogamous relationship. At Best, it is sometimes considered acceptable (barely) to "Play the Field" if one is not in a committed relationship. If one is in a commetted relationship, it is with one person only, and any sexual and/or romantic involvement outside the relationship is "Cheating". Subject to the classic double standard of being more acceptable (or at least less unacceptable) for men then women. Monogamous Relationships can be wonderful. Many people can have honest, stable, egalitarian, and very fulfilling monogamous relationships. But there are people-Straights,Lesbians, Gay men , and Bisexuals-Who have chosen other types of relationships. There relationships come in many forms but have one thing in common. The people in these relationships have agreed to be non-monogamous-to step outside the standard two-person, sexually fidelitous and romantically fidelitous relationship.