This study investigated the interaction effect of sex on cognitive behaviour therapy and logotherapy on risky sexual behaviours among adolescents, in public secondary schools in Benin metropolis, Edo State, Nigeria. The study adopted a quasi-experimental design, using pre-test—post-test, non-equivalent control grous. The population of the study comprised of SS II students in the Thirty-one (31) mixed public senior secondary schools in Benin Metropolis. The sample of the study consisted of one hundred and thirty-five (135) Senior Secondary Two (SSII) students. The study adapted the “Adolescent Sex Behaviour Inventory’’ developed by Friedrich (2004). The instrument was validated while the reliability coefficient of 0.926 was established. The collected data were analysed, using descriptive and inferential statistics. The findings of the study revealed that there is significant difference in the treatment interaction by sex in reducing risky sexual behaviours among school adolescents. Therefore, it was concluded that sex could play a role in the reduction of risky sexual behaviours among school adolescents. Based on the findings, it was recommended that school counsellors should encourage parents to give sex education early and discuss sex-related issues that are appropriate for their children in all stages to avoid the consequences of risky sexual behaviours.
