In order to know the practices that involve the expressions of sexuality and the contraceptive attitudes, an exploratory study has been accomplished in a group of 301 ninth grade teenagers, both sexes, aged between 13 and 18 years old, who attend three schools in Evora. A questionnaire has been filled in by each individual student. The results have shown that the attitudes towards contraception were favourable, not influenced by age, but demonstrating higher sensitivity in girls. Another data of clear importance shows that, among these adolescents, those who are sexually active are at risk of getting sexually transmitted diseases and/or an undesired pregnancy.