It depends on the attitudes of each one about living together before marriage. In my opinion, a live-in relationship is that place between a mere relationship and a life-long commitment, and it helps you understand if you and your partner actually want to spend your lives together. There are some advantages that living together before getting married can bring about. First, You and your partner can communicate more. As a result, you will understand more about each one. Second, when you’re in a live-in relationship, you and your partner bond on a much deeper level than a relationship. Both of you will have a chance to know what the other thinks and likes. Last, living together before marriage allows you both to spend a lot more time together. Also, spending time together helps you figure out how much space you need for yourself too. 

Yes they should