"I mean, are you telling me that, Muslim men do not have extra marital affairs and that is because their religion allows polygamy?"
No one said that, or will.

Reducing the figure? Yes. I know many who are considering a second wife instead of cheating on wife. In the west, it is just the opposite.

Different society norms I guess.
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"The larger grows the island of my knowledge, the
longer stretch the shores of my ignorance."