It wasn't to indicate distaste for the mythical being because, hey, I change my hair color enough to be in solidarity with their rainbow aesthetic. Instead it was to cut down on messages from couples who were unicorn-hunting. The joke is that the existence of such a woman is so elusive she may as well be a mythological creature. Obviously wanting to have a threesome between consenting adults is a common and totally healthy fantasy, and triads are one of many relationship models that can work for different people. Realizing potential thirds need to feel safe, seen, and have their boundaries respected should be nonnegotiable, Rachel Simon, L. I want you to find your third, and I want your third to feel safe and respected. Before you begin your search, there are a few things you should do first. Engaging in sexual relationships —whether with one, two, or 10 partners—involves navigating individual desires, setting boundaries, and communicating.