Young Moroccan Islamic immigrants are balancing the challenges of modern society and the influences of their cultural and social backgrounds. Prevention and information programs need insights into their knowledge, attitudes and behaviour concerning choice of partner, sexuality, contraception, STD and AIDS prevention. In a qualitative research project, Moroccan adolescents were invited to focus groups. The results show the specific influence of family, religion and tradition, the importance of virginity at marriage for girls, and the "almost evidence" of premarital coitus for boys. These adolescents have limited knowledge of contraceptives, STD and AIDS. Some boys pretend to perform safe sex in certain "unfixed" circumstances but show no concern about the possible risks for future virgin spouses. Most of the girls do not consider safe sex before or after marriage. There is a taboo on homosexuality.