Purpose: In response to rising prevalence of sexually transmitted infection (STI) among teenagers, this study was designed to examine teenage perceptions of sex education, access to services, and attitudes relevant to STI. Design/methodology/approach: A focus group study was conducted in three schools to discuss the sexual health needs of teenagers. Four single sex groups of 14-15 year olds (two male and two female) comprising six to nine participants met for two one-hour sessions. Interviews were recorded, transcribed and analysed by two researchers. Findings: Sex education was reported to vary considerably in quality and content both between and within schools. Participants felt that this was due to some teachers being embarrassed, resulting in didactic delivery and lack of discussion. Most participants had received very little information about STI, including how it could be avoided or what to do if infection was suspected. Many felt that it would be useful to have an organised visit to a sexual health/contraceptive clinic as part of the curriculum and that it would also be helpful if clinic staff contributed to their sex education. Research limitations/implications: Teachers selected participants based on their maturity and willingness to take part, which may have resulted in failure to include those in greatest need of sexual health services. Practical implications: Teenagers need more comprehensive sex education at an earlier age, delivered by individuals who are expert in the subject and comfortable in its delivery. Information alone is not enough but should be linked to accessible user-friendly services for contraception and general sexual health. Originality/value: This paper provides information on teenage sexual health needs in general and to the field of STI in particular.