Racist attitudes toward sex? In a game where repeated incestuous mating to propagate the species is not only commonplace, it's the accepted routine, normal practice? Pfft...
Well one race on that specific continent, the Dark Elves, I pushed culturally towards hating and loathing any other race.
Because the other races do not get buried in the holy city when they die, I taught them that all monsters in the world are the souls of those who were not 'Returned'(buried in the holy city).
I believe I had two of my sons murder some gargoyle wanderer and someone else. It was pretty awesome. I don't know if there are any purebreed dark elves left though, I know that one of them had a lot of children with a dwarf. That caused a lot of infighting.