Open Marriage

A form of polyamory relationship in which there may also be other lovers who are not partners in the given relationship. Most commonly, this refers to a primary couple who may have secondary relationships. The term "Open Marriage" was coined by the O'Neil's in their 1970's book by the same name. The bulk of the book was about expanded options for self fulfilment in a less confining relationship, but one chapter explored the idea of this including having other lovers, and it is this aspect of openness which the term refers to today.

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