monogamy: having a single long-term sexual partner
marriage: a legal and spiritual binding between two people that stretches beyond the boundaries of a committed relationship.
Female-led relationship: committed relationship where the principle partner is the woman and led by the woman; a matriarchal, female-centric, role-reversed relationship away from the former traditional patriarchal, male-centric relationship
sexual infidelity: having a sexual relationship outside of a relationship that includes a commitment to have no other sexual partners
sexual fidelity: not having other sexual partners other than one's committed partner, even temporarily
serial monogamy: having a series of monogamous relationships, one after the other
open relationship: a commitment to a partner without excluding other romantic or sexual involvement
polygamy: having multiple long-term sexual partners
polyandry: having multiple long-term male sexual partners
polygyny: having multiple long-term female sexual partners
polyamory: encompasses a wide range of relationships, including those above: polyamorous relationships may include both committed and casual relationships
relationship anarchy (or relationship activism): having relationships that do not need to be guided by any predetermined rules or norms, but rather can be developed as an agreement between those involved.