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French term which originally described a domestic arrangement in which three people having sexual relations occupy the same household – the phrase literally translates as "household of three".1 In contemporary usage, the meaning of the term has been extended to mean any living relationship between three people, whether or not sex is involved, but because it has also been extended to refer to the actual sexual act between three people, otherwise known as a threesome, the term retains its suggestive quality.
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