However, when you want to be the cohabitation couples, you should be careful concerns about the suitability, the responsibility, the maturity and the readiness. For example, in the case that you are the teenager, the studying age and you cannot risible for yourself. So you should not be the cohabitation couple because it will effect on your study, but if you are the working age or graduated, the cohabitation is the interesting ways that it can help you to have more efficiency and successful marriage.