If you consider that mankind is just another animal species on this planet then no monogamy is not natural for either Male or Female.
Breeding is purely about seeking out the most suitable partner to pass your genes onto the next generation.
Natural selection is where the female should seek out the best breeding male depending upon what is required for survival,be that biggest, fastest, strongest, smartest Etc.
From a male perspective most males will seek to breed with the greatest number of females to ensure his genetic line is the most sucessful.
It has nothing whatsoever to do with religious indoctrination that is merely a human socialised confusion.
Of course if you look around at todays population you may get the impression that pure nutural selection has gone astray with most females accepting most males purely on the basis that Sex is Fun !