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

Reviewed August 20, 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.

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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