In fantasy novels and movies, a unicorn is a beautiful mythical creature that can symbolize purity, happiness, and magic. In the poly dating scene, a unicorn refers to an equally rare and amazing creature — a bisexual woman who is open to having a threesome. This slang term is more than a little tongue and cheek, and it hints at the difficulty that some couples (aka unicorn hunters) have in finding a woman to be their third for the night. A threesome app like Adult Friend Findercan be a game changer for sexually active online daters around the world. Whether you’re a bisexual couple or a single person, you can join the AFF community and start pursuing dates by using the search filters or posting in the chat room. We’ve already mentioned Adult Friend Finder in this list of couple-friendly dating sites, but it bears repeating that this platform allows local couples and singles to mingle freely and arrange steamy encounters as much as they please. Our expert ratings are based on factors such as popularity, usability, value, and success rate of each site.