The objective of this work was to study the perception of teenagers for their own sexuality in the Tunisian socio-cultural context. One hundred teenagers participated in the study. They filled in an anonymous self-report questionnaire, consisting of 14 items relative to the aspects that seemed to us the most meaningful concerning teenage sexuality. Eighty-one percent of the participants did not manage to provide answers, in conformity with scientific data, to a minimum of 75% of the items. Fifty percent considered masturbation at adolescent age to be pathological. The possibility of a homosexual tendency during adolescence was rejected by 75%. Eighty-one percent perceived the subject of teenage sexuality as embarrassing. They were not permissive regarding the issue of sexual protected relations amongst adolescents in 44% of the cases, and regarding the interest that a female teenager could have in sexuality in 23% of the cases. Our study demonstrated a relatively high frequency of prejudice relating to teenage sexuality amongst the teenagers, reflecting the impact of the taboo on sexuality and particularly on the female teenager in the Tunisian socio-cultural context. The change in mentalities regarding teenagers’ sexuality should take place very smoothly.