I think I posted a similar comment about the complexity of serving the Amazon tribes because the tribal customs are far from the Western norm...  there is this... on how marriage is handled.

"In Yanomami society, marriage ceremonies are almost non-existent and are not celebrated in any way. Marriage is a social dynamic within villages, and they are usually driven by political opportunity by men who are seeking alliances with other men from different villages.[citation needed] Polygamous marriages are common, meaning husbands can have many wives. The demand for women outweighs the actual population of the Yanomami women because of the growing practice of polygamy.[citation needed] A girl can be promised to a man at an age as young as five or six, however cannot officially be married off until after her first menstrual period.[6] This is considered a marriageable age."

and a village is one large communal dwelling...
going to Rome for this synod would mask the reality of the challenges.