Mating by definition is procreation between two members of a species.
On Nor, each continent and region has its own rituals and binding rules specific to pairing, including matrimony, although some traditions are often ignored or entirely foreign to lower and middle classes of society.
On the subject of out-of-species mating
It is illegal in most of Aianar to mate outside of your species. It is also considered, in most of Aianar, wrong or strange. A few countries, such as Manticene, allow different-species mating and marriage however, with little to no judgement.