Here are reported the final data to out of the analysis of the answers given in a questionnaire distributed to more than a thousand students of the secondary schools of Avezzano before the beginning of a course of sexual information. The questions covered general information (including an opinion on the idea and on the way of treating a course of sexual information at school) such as knowledge of contraceptive methods, the illnesses that are transmitted with sexual acts, the most important rules for the prevention of tumoral pathologies in women and the knowledge of the family's advisory bureau. With a very careful analysis of the answers we have been able to get out very important data about the knowledge that the young people have of sexual arguments (arguments that have guided the successive course of information), and interesting aspects of boys' and girls' psychology with regard to sexual arguments.