Should unmarried couples cohabit before marriage?

Cohabitation: The marriage enemy
In this article, Cohabitation: The marriage enemy, young adults think that living together before marriage has many benefits. They don’t have to worried about divorce and know each other well through cohabitation. Besides, they can reduce costs on renting house and save money easily. Also, if they found that they are not suitable for each other, break up is easier than divorce. However, cohabitation is not a positive phenomenon in society; it may destroy the originally social order. Cohabitation may abate the benefit of marriage and cause dangers.
There are some suggestions about cohabitation. First, cohabitation can’t assure that you will have a successful marriage. Second, the habit of cohabiting is not good; cohabitation can’t prevent divorce. Third, if a couple cohabit; they should live together for a short period. Most important, avoid to cohabit if they have children, or cohabitation often hurts children.