Even though inter-species marriage among the clans in the Beast World has long been common, expanding the range of choices often means more and better options. But initially, most Beastmen still preferred to marry within their own clan because they were more compatible and it was easier to reproduce.
Secondly, they might choose Beastmen who, although not of the same clan, belonged to the same broad category.
For example, Lu Xiao's parents were one a Hawk and the other a Golden Feathered Roc, both mighty and large members of the Feather Clan, and less than half a year together, they had Lu Xiao.
Xue Yinzhou didn't care much about offspring, but he longed for a more harmonious intimacy with his partner and cared more about her feelings. He once thought that if Tangtang were a female of the Snake Clan, it would be ideal, but there is no such thing as perfection in the world. Being able to have her is his greatest fortune in this life.
