This study concerning the development process of the premarital sexual attitudes of youth, explores how the young people develop the sexual attitudes of their own, in a situation of the confusion of sexual values and the collapse of sexual morality, and explains the meaning of that process and experience. The study is carried out by applying the ‘grounded theory method’ of Strauss and Corbin(1998). The results of the study point out the ‘Escape from the Swamp of Confusion’ as the central phenomenon of the development process of premarital sexual attitudes. ie, the development of the purity values of the girl students was seen as the process of ‘escaping from the swamp of confusion and dreaming positive dreams, other than the influence of simple family discipline or religious belief. It could be seen as the gradual process of development as changing towards internal and external through the dynamic interaction between person and environment, and so, it could be found that this kind of process is made not only from the experience of the person but also through their interaction with the surrounding environment. Therefore to prepare a healthy and right awareness and consciousness about sex in the personality of the youth, it is necessary that the family, school, society and religion should ensure their respective parts and should continuously maintain the sex education consistent to their sphere. And a ‘life-education’ that teaches the healthy maintenance of the body which should produce the fruit of precious life should be formed. And also it is necessary to construct a system in order to help the strategy and practical process which were left as their personal matter, through cultivating programmes fit for the development stages of the youth and help them to dream ‘positive dreams’ by establishing a concrete and definite vision.