[Space/Aliens] Reproductive Features: alien, exotic and weird ideas

[Phantasm]

I've always considered a few genders for aliens:

Male, Female, Hermaphrodite, Hermaphromorph, Neuter, and Referee.

The first two are self-explanetory. Hermaphrodites have both male and female sexual organs; Hermaphromorphs can change gender, either at will or under various circumstances; Neuters are essentially those that lack sexual organs of any kind, unable to participate in the reproductive process.

Referees are those who act as matchmakers; while technically genderless, they have the ability to induce 'heat' in those with female genitalia, cover any of the other genders with pheromones that attract those with opposite genitalia, and act as guides to ensure healthier offspring among those with female organs. (They also make excellent diplomats with other sapient species.)