ionsawmillWe’re all familiar with the mythical unicorn—a horse with an insanely phallic symbol protruding from its forehead. Then there's the sexually positive, socially progressive, and wildly fun other type of unicorn: the person who sleeps with couples. Typically, the sex-kind of unicorn is a bisexual man or woman who is down to hook up with monogamish and usually hetero couples, often as a no-strings-attached threesome experience arranged in advance.