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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.
by Abu Yahya March 21, 2010
15 4

Words related to open triangle

closed triangle ménage à trois relationships threesome