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What does FMF (Female-Male-Female Threesome) mean?

Reviewed October 25, 2026

FMF describes a threesome involving two women and one man. It is among the most commonly sought encounter types in the Lifestyle, and among the configurations where a unicorn is most often involved.

Illustrative scene: adults dancing beside a DJ at a jungle-themed club night
Illustrative scene · Fictional adults

FMF is a common shorthand for a threesome involving two women and one man. Its mirror image is MFM — two men and one woman — and the two are frequently confused; the letters name who is present, not what anyone has agreed to do. The specific boundaries vary widely, and the label alone says nothing about who is attracted to whom.

In practice, the couple tells a prospective third partner what they have in mind before anyone meets.

A respectful introduction gives the third participant complete information, treats her preferences as equal, and avoids presenting a couple's fantasy as an obligation. Every person can set limits or decline without persuasion.

JoinTheSwing is designed with visibility controls and consent-gated Message requests for single women. The platform does not publish a claimed population of FMF participants, and those controls cannot guarantee compatibility or safety.

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