Well, we have drawn somewhat on the "Arabian Nights" ancient pre-Moslem Arabic culture to flesh out Caph, so perhaps its timely to remind ourselves of the roots of the mythos.

But it's not just an Eastern thing. Ancient Celtic hospitality sometimes included loaning one's wife to an honoured guest for the night.

We've also established that Caph naturally has a 5-1 gender imbalance, which neccessitates a different approach to sexual relationships and different expectations of fidelity.