Objective 
Since 2007, 4.2% of adolescents have had sex before they were married, most of them or 70.2% were adolescents between the ages of 15-19 years. Since 2005, West Java has always topped the number of HIV/ AIDS cases, dominated by the age of 15-29 years and not only in urban areas, premarital sex habits also occur adolescents on the rural areas.
Method
The research subjects were all students of class XI and XII SMA X who attended school on Saturday 28 March 2015. The study was Analytical used chi square analysis with Cross Sectional design. The research sample were 37 people. Sampling using questionnaires.
Result
The most students in father with an elementary school education have dating, handrails, kisses, never having sex/ intercourse, watched porn, masturbation. The most of the students in the mother with an elementary school education have dating, handrails, kisses, never having sex/ intercourse, watched porn, masturbation. Students have intercourse with the opposite sex are 4 people.
The results of statistical analysis showed that correlation level of education of father's with the incidence of premarital sex had an P value as follows dating 0.572, handrails 0.807, kissses 0.294, having sex/ intercourse 0.599, watched porn 0.637 and masturbation 0.544. The results of statistical analysis showed that correlation level of education of mother's with the incidence of premarital sex had an P value as follows dating 0.572, handrails 0.807, kisses 0.294, having sex/ intercourse 0.599, watching porn 0.637 and mansturbation 0.660.
Conclusion
Most students have been dating, handrails with  the opposite sex, kisses, masturbation and watched porn and most of their parents have elementary school education. It was found that students had intercourse with the opposite sex are 4 (11%). There is no significant correlation between level of education of parent (father and mother) with premarital sexual in adolescents.