—— Guides · Glossary
What does FMF (Female-Male-Female Threesome) mean?
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.
FMF is the most-searched threesome configuration in the Lifestyle, which is part of why the unicorn dynamic receives so much community attention. A couple — typically a woman and man — invites a second woman to join them. The specific boundaries within an FMF encounter vary widely: they may be soft-swap or full-swap; the women may play primarily with each other, primarily with the man, or in any combination the three parties negotiate.
From an etiquette standpoint, FMF encounters work best when the third woman has been approached respectfully, given full information about what the couple is hoping for, and treated as a participant with her own preferences rather than a fantasy prop. Couples who write honest, specific Letter introductions — 'we're looking for a bi-curious woman for a soft evening, both of us play with her, no pressure on our end' — get far better responses than vague or overly eager requests.
JoinTheSwing's single-woman member segment includes many confident FMF participants, and the platform's architecture — discreet profiles, consent-gated Letters — makes it a safer environment for them than general dating apps.
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