Polyamory in the context of "Sexual partner"

Extramarital sex is sexual activity in which at least one sex partner is a married person and the partners are not married to each other. The term may be distinguished from premarital sex where neither partner is married.

Where extramarital sex does not breach a sexual norm, it may be referred to as consensual non-monogamy (see also polyamory). Where extramarital sex does breach a sexual norm, it may be referred to as adultery or non-monogamy (sexual acts between a married person and a person other than the legal spouse), fornication, bigamy, philandering, or infidelity. These varying terms imply both immoral or religious consequences, charged whether via civil law or religious law.

Group marriage or conjoint marriage is a marital arrangement where three or more adults enter into sexual, affective, romantic, or otherwise intimate short- or long-term partnerships, and share in any combination of finances, residences, care or kin work. Group marriage is considered a form of polygamy. While academic usage has traditionally treated group marriage as a marital arrangement, more recent usage has expanded the concept to allow for the inclusion of non-conjugal unions. Colloquial usage of group marriage has also been associated with polyamory and polyamorous families.

An open relationship is an intimate relationship that is sexually or romantically non-monogamous. An open relationship generally indicates a relationship where there is a primary emotional and intimate relationship between partners, who agree to at least the possibility of sexual or emotional intimacy with other people. The term "open relationship" is sometimes used interchangeably with the term polyamory, but the two concepts are not identical.

Open relationships include any type of romantic relationship (dating, marriage, etc.) that is open. An "open" relationship means one or more parties have permission to be romantically or sexually involved with people outside of the relationship. This is opposed to the traditionally "closed" relationship, where both parties agree on being with one another exclusively. The concept of an open relationship has been recognized since the 1970s.

Monogamy (/məˈnɒɡəmi/ mə-NOG-ə-mee) is a relationship of two individuals in which they form a mutual and exclusive intimate partnership. Having only one partner at any one time, whether for life or serial monogamy, contrasts with various forms of non-monogamy (e.g., polygamy or polyamory).

The term monogamy, derived from Greek for "one marriage," has multiple context-dependent meanings—genetic, sexual, social, and marital—each varying in interpretation across cultures and disciplines, making its definition complex and often debated. The term is typically used to describe the behavioral ecology and sexual selection of animal mating systems, referring to the state of having only one mate at any one given time. In a human cultural context, monogamy typically refers to the custom of two individuals, regardless of orientation, committing to a sexually exclusive relationship.

Non-monogamy (or nonmonogamy) is an umbrella term that describes a relationship arrangement where one or more partners are not sexually and/or romantically exclusive to each other. Monogamy and non-monogamy are not strictly binary categories, but rather exist on a continuum encompassing various degrees of exclusivity and openness - at one end of this continuum lie strictly monogamous relationships, while at the other end are openly non-exclusive arrangements with numerous nuanced forms of varying degrees of openness in between. Non-monogamous relationships have been practiced across cultures and throughout history, reflecting diverse social norms, legal frameworks, and personal preferences.

In contemporary discourse, non-monogamy is understood to encompass a variety of practices, ranging from culturally institutionalised arrangements like polygamy to consensual agreements such as open relationships and polyamory, as well as non-consensual forms like infidelity.