In recent years, more and more young people tend to live together without married. They consider that is absolutely suitable way to express their love. For West countries, cohabitation is a normal and popular phenomenon; however, in Vietnam 
For me, the young cohabit mean they themselves lose the value of morality and the value of love. With modern, free life-style of West people, cohabitation is easy to be accepted while Vietnam- 
Moreover, easy accept cohabitation make a lot of women pay a heavy price for their health and even their future. According to a recent research of Tuoitre newspaper, Vietnam 
The last reason why the young should not cohabit is this is the easy way to make a lot of contagious diseases. Cohabitation is the cycle of cohabiting, breaking up and cohabiting. So, a person can have sexual relationship with others that leads diseases such as contagious, syphilis, gynaecology, even HIV/AIDS.They beleive that using safe way like using medicine or protection thing can avoid those diseases. However, it is really hard when they have too many sexual relationship. With unlucky people ,their life will be difficult and even come to end. A lot of HIV/AIDS people are kept away and been frightened of around people, they can be lose family, lover, job.etc. Although medicine is more progressive, these diseases are still really difficult to treat. Prevention is better than cure; therefore, everyone should build a strong life-style by saying ‘NO’ with cohabitation.
I believe that without cohabitation, the young will have a happier marriage, a stronger health as well as better personality. In this modern life, we live more free, more modern but do not be carried along with the impossible trend with our country like cohabitation.
