No, it does not work out this way. The bible does not mention anything about a woman marrying more than one husband. You must be feminist or something. The "natural" thing is for guys to have as many wives as they wish. Abraham, Moses, Solomon, Mohammad did that. Joe Republic should have the right to 4 bitches and all the whores he can buy, a la Koran!
The Biblcal story of Bathsheba proves you wrong.
I've always thought that it is more "natural" for men to have more than one mate/wife. Science backs it up too - I think they've even done DNA tests (on mice, etc.).
In the days long ago it was important to mate with more than one woman - improved species survival (look at deer, etc.). It doesn't seem natural (on the whole) to mate with your same sex (although some animals, including some humans will screw anything that moves.)
So, polygamy seems a very natural thing to do. However, killing your enemy or someone who threatens your survival is the natural thing to do as well (like that guy in the next cubicle looking at the same management position).