With the alchemical term rebis – link is to Spanish Wikipedia since the English entry appears to be broken – the primordial hermaphrodite, and the symbol of the unification of two opposing properties – it occurs to me I have the perfect ready-made term, translation-convention-wise, for a herm body operated by a two-person hive-mind Fusion of a previously opposite-sex couple.  Who presumably have taken a desire for greater intimacy to its logical limit and slightly beyond.

It’s not that there are going to be a lot of those running around, mind you, but in a world that supports near-total morphological and gnostic freedom, there are undoubtedly some.