A sexual-preference designation. Rather than identifying as "gay" or "lesbian" or "bi", a soul sexual is attracted to the soul inside the object of their affection. Race or gender does not factor into the attraction.
Woman #1: I heard you were with a woman now...so, what are you, a dyke?
Woman #2: No, I'm soul sexual - the soul I fell in love with happens to be in a woman's body.