Hijab and finding the fulfillment of sexual desires within the family environment will strength the relationship between a husband and wife.
In comparison between system of free sexual and limited sexual society, we understand:
In the free sexual system the wife is considered as a competitor, someone who gets in the way of that person's 'fun' like a prison guard! Consequently, family based on hating and detesting.
Whereas in the limited sexual society, getting married is one of the greatest desire of young. Because he was deprived before getting married. He anticipated for a long time to become married. For this very reason, the partners saw their happiness and well-being in their partner, and they live friendly for a long time.
But in promoted free relationship, getting married is one of hardest task. because it is the beginning of deprivation and limitation. By blessings of Western culture which introduced so many women as goods, sexual desires are so freely satisfied outside of marriage; and for getting married it is necessary to speak to them about ethics and morals!
Consequently free relationship between girls and boys causes the relationship between a husband and wife to grow cold. And in other hand we know the importance of family, so we must combat against free relationship and confirm the root of the family.
Sources: Adopted from Mutahhari, Murtedha, Islamic Hijab Modest Dress; translated by Bakhteiar.