Unicorn — a person (most often single) who enters into a relationship or intimacy with both partners of an existing couple at once.
What it means
The name hints at rarity: finding someone who fits naturally into an already established couple and suits both of them is genuinely difficult. The term itself is neutral, but the community also talks about “unicorn hunting” — a situation where a couple looks for a third person while putting their own interests above that person’s feelings and needs. This approach is considered ethically questionable, because a unicorn is an independent person, not an “add-on” to the couple. A healthy configuration is possible when the new person has a voice, their own boundaries and an equal standing. Respect for the unicorn matters just as much as the partners’ attention to each other.
Example
A couple meets someone who is interested in both partners, and all three openly discuss expectations and boundaries so the relationship is equal and comfortable for everyone. No one is left in the position of a “guest.”
Related terms
Triad, Polyamory, Dyad
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