I only see the need for two lovees and genders, Male and Female. The people who are convinced they were meant to be born as someone else are not going to be swayed, might as well refer to them as a man or a woman. Maybe Aphrodite if for whatever reason they decided to keep the extra parts.
However things like agender, pangender, meatstick, polmorpheausredpyrofox are extremely redundant and silly in my opinion. I understand that people who to recognized as special, but the world does not spin around anyone person.