One of the major races in my “planetary romance” campaign is a race of hermaphrodites. Their genetics (a term not actually used in play) were altered by their parent race, as follows:
"Known in Xosnecal as xasirusca, hermaphroditic xos were rare and unique individuals until the rise of Old Tyrx, the greatest of the xos dynasties to rule the Hundred Cities. The sata-cat (ruling class) of Tyrx created the xasirusca as a caste of pleasure slaves, fleshcrafting the mulus-maa (lower classes) as they saw fit. The xeova (perpetual child-slaves) and xulithela (sex-shifters) were similarly created by these depraved carnal adepts. When civil war finally broke out in Old Tyrx, the xasirusca as a group sided with the sars of Nyomogous, wherein their discipline and mastery of monastic psionics helped turn the tide against the western mindlords. The xasirusca took the Immortal Cities of Siondous as their own and established their own states, which, despite the general decline of xos culture, have managed to retain their hard-won freedom.
"The xasirusca are true hermaphrodites, possessing equally both sets of gender characteristics. Unlike the xeova or xulithela, both of whom as races are incapable of breeding, the xasirusca are capable of successful reproduction, either among themselves, whereupon the offspring is always a hermaphrodite, or with their pure xos forebears, whereupon the chances of the offspring being of either gender is about equal to the chances of it being both at the same time. Though they are looked down upon and pitied for their limited perspective, a small population of “mono-genders” born of such unions live among the hermaphrodites and share some of their cultural characteristics.
"Personality: Surprisingly, for all that they were designed by the Tyrxans to be a race of sex slaves, the xasirusca are a prim, principled, and, somewhat shockingly, parochial people. The decadence and intemperance of their ancestors and modern xos cousins have given the hermaphrodites a strong sense of conservatism Most possess an almost ascetic sensibility, and the monastic way of life is common among them. In fact, many of the ancient psionic/monastic disciplines once practiced by the ancient xos but since abandoned still survive in xasirusca society.
"Lest rumors to the contrary be dashed, the xasirusca’s austere conformity in politics and general attitude ends there. In matters of sensuality, particularly in regard to sexual adventurism, the hermaphrodites are every bit as libidinous as the xos. The difference is that while the xos - particularly male xos - are exploitive, the xasirusca seek a higher level of intimacy. Though there are exceptions, the xasirusca have a need for very close relationships, the nature of which sex plays only a small, though integral, part. Partially this is due to the nature of xasirusca society, which stresses public spiritedness. The xasirusca believe in the greatest good for the greatest number of people; they respect the individual, but the community always comes first. Pleasures and comforts which cannot be shared evenly are not popular among the hermaphrodites."
They are isolationist, distrustful of outsiders (“mono-genders”), and fairly lawful in alignment.