The cultures of Bahu and Matrak were once similar, both following their pagan religions. But due to the decision of their individual ruling noble families, over time, they diverged so significantly that by now they were almost incompatible.
For instance, before the advent of the Ramuh faith, both regions followed a tradition of marriage that was very different from the strict husband and wife structure of now. This monogamous idea came mainly from the Ramuh faith.
But before, people usually just lived in large joint families, where the men and women would cohabitate under a single roof with no formal ceremony.
And in that house, everyone would be allowed to freely have relationships with each other.
So all the brothers had access to their, what we would call 'sister in laws'. And vice versa, the women were able to approach any men as they wished.
