It's an umbrella term that can cover an open relationship, a polyamorous setup, or a couple who swings. Dr. Cat Meyer, a sex and relationship expert, suggests easing into an open relationship rather than jumping into the deep end, especially if one or both of you are new to this type of relationship structure. The Importance of BoundariesIf deciding to have an open relationship is the first step, having a talk around boundaries is the second. Boundaries are so important in any relationship, but especially in an open relationship. Your partner is allowed to not want an open relationship.