Adolescents are engaging in sexual relations earlier and earlier while being insufficiently and inadequately informed about sexuality and sexual health because the media and their peers are their main sources of information and they engage in risky sexual behaviors that can leave numerous, serious and long-term consequences on these young people and their reproductive health. Unlike a number of other countries in the Croatian education system there is no separate school subject that deals with this topic so topics about sexuality are integrated into contents of other subjects. The aim of this paper is to examine the opinion of students about the need to introduce sexual education in schools based on their past experiences in sexual relations and experiences in education and information about sexuality and sexual health. A survey of university students in Croatia was conducted and data was collected on sexual behavior of students, their awareness of sexuality and sexual health in the time of their first sexual intercourses, methods of information and education about sexuality during their upbringing and schooling and their opinions on introduction of sexual education in schools. The results show a rather negative picture of sexual behavior of the student population, insufficient information about sexuality, lack of quality sexual education in schools and the need to introduce sexual education in primary and secondary schools as a separate subject.