The research followed the relations between opinions, ideas and attitudes of young girls for certain types of sexual behavior. Methodological comprehensive questionnaire was used in the Oregon Research Institute, 376 students who completed secondary medical schools and third-fourth grades (ages 17 - 18 years). Although sexual intercourse without condom is perceived risk and the possibility of controlling the risk control is assessed as average, more than half of respondents stated that the sexual intercourse without protection in the last half year. The terms "sexual intercourse" and "use condoms" have raised the respondents mostly positive associations. The results of the investigation support the need and the need for sex education, not only in the family, at primary and secondary schools, but also by health professionals.