Adolescence marks a critical juncture in physical and psychological growth, encompassing the onset of sexual maturity and accompanying behavioural implications. Diminished parental oversight, coupled with the pervasive influence of peers and online erotica, have contributed to the prevalence of risky sexual behaviour (RSB) among adolescents.

The age at which individuals have sex for the first time is significant, and a factor that shapes subsequent sexual behaviour. Interventions aimed at postponing this pivotal milestone have emerged as a necessity to avert associated socioeconomic and psychological repercussions. This study endeavoured to elucidate the correlation between the age of inaugural sexual activity and RSB among 18- to 19-year-old learners at public and private schools in Kinshasa (DRC).

To protect the privacy of the 400 student participants, a convenience sampling technique was adopted. Data was collected using a mixed-methods approach comprising quantitative surveys and qualitative interviews. The findings revealed a shift towards premarital sexual activity among Kinshasa’s 18- to 19-year-olds, characterised by early sexual debuts, multiple partners and suboptimal condom use. The study illuminated the positive impact of parent-child sexual communication on contraceptive knowledge and delayed sexual initiation.