A gay muslim wedding. Considering that a Muslim man is allowed four "wives"--well...
It is not only in islamic societies that this view prevailed, it makes perfect sense.
Because we have a large population that replaces itself easily, and lots of wealth, comparitively, we view such arrangements as primitive and indulgent, as we promote monogamy. Apart from the indulgences practiced by muslim men who could get away with it, polygamy probably wasn't considered primitive and indulgent for most muslims in past centuries. It was necessary for survival of individuals and the state.