a sexual
relationship involving three persons, two of whom never have sex with EACH OTHER. For example, in a
heterosexual triangle M-F-M, the two men have sex with the woman but never with the other.
See
closed triangle.
A famous example of an open triangle was that involving Manuel de Godoy, Queen Maria Louisa, and King Carlos IV . In exchange for servicing two of the most repulsive people in Europe, Godoy made an enormous fortune and became the
effective ruler of Spain.
The
relationship was an open triangle because the
king and queen found each other unbearable.