Some couples create a physical relationship contract.
These can be useful in not only negotiating, but also clearly articulating the needs, wants, limits, expectations, and commitments that are expected of the parties involved.
The concept of an open relationship has been recognized since the 1970s.
The term open relationship is sometimes used interchangeably with the closely related term polyamory, but the two concepts are not identical.
In short, it is more associated as a flirting or a physical kind of relationship.
Topics that are commonly found in negotiations between couples include honesty, the level of maintenance, trust, boundaries and time management.
Other tools that couples utilize in the negotiation process include allowing partners to veto new relationships, prior permission, and interaction between partners.
The main unifying element to open relationship styles is non-exclusivity of romantic or sexual relationships.
Some believe that open relationships occur more frequently in certain demographics, such as the young rather than the old in America, including, more specifically, the college-educated middle-class, rather than the uneducated working-class, or people of certain ethnic and/or other racial minorities.