There are a lot of men who will say that they want many. It happens especially when they can afford it. It's not really bad if women don't have any objections.
The survey shows that polygamist societies live much longer than those who have one woman and live only eith her. Of course it is to a man's advantage when he is taken care of by several women. Mat be this is the reason of their longevity. Besides they are made to be healthy and strong because they know that they have to support them. So, the number of wives in polygamic societies depends on the number of money the man has and shows his social status.