What does "unicorn" mean in the swinger lifestyle?
A unicorn is a bisexual single woman willing to play sexually with both members of an established couple, typically without forming a romantic attachment to either partner. The name reflects how rare the configuration is: most bisexual single women on lifestyle sites are looking for connections on their own terms, not as the third in someone else's couple-led arrangement. Couples actively searching for one are sometimes called "unicorn hunters", a label often used pejoratively when those couples set unrealistic expectations.