Literatures indicate that adolescent boys and girls have different beliefsrnabout sex. The major purpose of this study was to investigate the patternrnof these differences and the possible gender and age difference.rnData were collected from second cycle and high school students who werernrandomly selected from five Woredas. A total of 540 students werernconsidered as data sources from grade 7 to 12. Self- constructedrnquestionnaire was used to measure adolescents' sexual . belief on preerotic,rnerotic and post-erotic sexual issues and their source of informationrnin forming sexual belief As regards data analysis, the meim scores ofrnadolescent boys and girls on sexual belief and its source were compared.rnMore specifically, important sexual elements such as love, dating, virginity,rnsexual intercourse, masturbation, unwanted pregnancy and sexuallyrntransmitted disease observed'on gender and age trends.rnIn the study, the extent of conservativeness on sexual lssues comparedrnamong three age groups and two sexes. Significant differences werernobserved in their sexual belief especially on dating, virginity, sexualrnintercourse, masturbation, and unwanted pregnancy. Significant differencernalso was seen in the three age groups on some sexual issues like sexualrnintercourse, STDs, virginity. After conclusion important recommendationsrnwere made, such as including sex education sufficiently in the curriculumrnso as to provide sexual information evenly for different age and sexrngroups.