How often do the different Races inter-mingle with each other?

[Lambdafish]

Given the racial diversity in the cities, im actually surprised that we don't see it more often. Though the likely reason is that the races are conditioned to be more attracted to their own race. Races with similar physiology makes sense (like in hilda case), but I don't want to imagine a roegadyn and a lalafell doing the dirty (shudder)

Also, we have specific lore regarding the mating patterns of several races and sub races, and they are vastly different (just looking at sun and moon miqote shows differences), it might be these mating differences that makes interracial bonds difficult