How can you have more than one wife?

In most modern Western cultures, it is not legal to be married to more then one person at a time. It must be kept in mind however that there are other society's in the world where having more then one wife is not illegal and the number of women you can take as wife is limited to what you can afford. This is not cheating this is just the way it is. even in a biblical sence there is no problem with having more then one wife.