Quad
Also called: Foursome (relationship)
A four-person committed relationship — typically two couples who have folded into a single relationship structure. Like triads, quads can be polyfidelitous (closed) or open. The term overlaps with "foursome", which more commonly refers to a single sexual encounter rather than a relationship.
Quads usually form one of two ways: two existing couples who become romantically and sexually entwined and decide to identify as one unit, or a triad that adds a fourth partner. The structural detail that separates a quad from a swap-friendly pair of couples is intent. Polyfidelitous quads are closed: members agree not to take outside sexual or romantic partners, mirroring the structure of a marriage extended to four people.
Internally the configurations vary. A so-called full quad has all six possible dyadic pairings active, plus the triadic and four-person dynamics that build on top of them. More commonly, some bonds are romantic while others are platonic or metamour, producing N-shaped or Z-shaped quads where two members are partners with everyone and two are partners with only some. Living arrangements span single shared households, neighbouring homes, and full geographic separation with shared travel.
The vocabulary overlaps with foursome, but lifestyle communities draw a sharp distinction. A foursome is an event, usually a single sexual encounter between two couples who go home as two couples. A quad is a relationship structure that persists across encounters, with shared logistics, often shared finances, and the kind of decision-making cadence one expects from a serious long-term partnership. The label signals intent to build something durable, not to schedule a play date.
Sources: Wikipedia
Related Terms
- Triad — A three-person committed relationship where all three are romantically and sexually involved with each other. Distinguished from a "vee" — where one person is romantically involved with two others who are not romantic with each other. Triads can be open or closed; closed triads are sometimes called polyfidelitous.
- Foursome — A sexual encounter involving four people, most often two couples. "Quad" is also used for an established four-person polyamorous relationship.
- Polycule — The full relationship network connecting a polyamorous person's partners, partners-of-partners, and shared relationships. Often diagrammed as a graph with nodes for each person and edges for each relationship. Polycules can be small (a triad) or large (extended community networks).