I have seen it happening in the Middle East as 'barter' or commodities of exchange.
A man around 60 would talk to his friend also around 60 so explicitly, "O My brother, your daughter must be menstruating now. My daughter has just started her menstrual periods. How about giving our daughters to each other to please our hearts and strengthen our bond of friendship?" Almost invariably, the answer was in the affirmative, "La Maane'" (No stopping).
One such barter was taking place in my hospital waiting room. I asked them how the young girls would feel about this dire injustice. They responded, "Well, Dactoor, they happily become used to it because they see this happening all around them in the families and neighborhoods."
All I could tell them was to make such deals out of the hospital in a court of law, knowing well the court too would happily say, "La Maane'".
Poverty was not a factor in the five exchanges that I saw.