Quad
A quad is a polyamorous relationship involving four people, often formed when two couples connect or a triad welcomes a fourth partner.

A quad is a polyamorous configuration of four people linked through romantic or sexual relationships. Quads often form when two couples become involved with one another, or when a triad welcomes a fourth partner.
The internal shape varies widely. In some quads all four are involved with each other; in others the connections form pairs or a chain, with everyone aware of and comfortable with the structure. Metamour relationships are a big part of how a quad feels day to day.
With four people, communication and scheduling become an art. Successful quads lean on the same principles as smaller configurations — consent, transparency and compersion — applied with extra care so everyone stays included.
Frequently asked
Most commonly when two couples connect romantically, or when an existing triad adds a fourth partner.
Not necessarily. Some quads are fully interconnected; others are made of pairs or a chain, all by mutual agreement.