This study was conducted to explore the effectiveness of a program teaching healthy sexuality values on adolescent sexual awareness and sexual behavior. For this study, the present researcher, along with two other professors, developed a 4-h program on 4 different subjects, and conducted the full education program through four different 4-h sessions for the same 160 students. This study obtained responses from 160 students through both a pre-survey and a post- survey. A qualitative study was also performed. Seventy students among the 160 students were randomized. They were individually interviewed. The results from the surveys complemented the findings from the qualitative interviews. An analysis of the reliability and validity of the pre-post surveys for this study showed that three different factors (sexual awareness, sexual behavior, and pure love family planning and acceptance) with 11 questions were reliable. A pre-post analysis using a paired t-test showed that after healthy sexuality values program, the sexual awareness index improved from 0.94 (p less than 0.05) to 0.98 (p less than 0.05) and pure love family planning and acceptance index jumped to 0.87 (p less than 0.05), indicating that there were positive effects on those who participated. However, repeated measure analysis of variance showed nearly no changes between male and female students in sexual behavior (F = 0.440, p greater than 0.05). It turned out that female students improved their perception of sexual awareness (F = 11.064, p less than 0.05), and pure love family planning and acceptance students (F = 20.267, p less than 0.05) more than male. In other words, female students established more firm healthy sexuality values through this program. It clearly indicates that healthy sexuality values programs should be expanded for teenagers to firmly establish a healthy view of sexual awareness and behavior. Moreover, the gap between male and female students in pure love family planning and acceptance means that our youths accept double standards that apply to men and women differently. In order to resolve this problem, we need to put the healthy sexuality values education into practice on an equal basis, and make comprehensive changes in the general perceptions concerning sexuality.