PIP: From 1970 to 1986 the AIDS epidemic has contributed to a new definition of the roles of boys and girls. For the past 20 years the University Institute for Social and Preventive Medicine as well as the Public Health Service of the Canton of Vaud in Lausanne, Switzerland, have conducted several surveys on the health behavior of teenagers. Ten years ago love affairs ranked 10th within health concerns. In 1992 the same item ranked 3rd: 35.8% of the girls and 28.2% of the boys felt they needed help to solve their problems. In 1982 the percentages were 18% and 15%. In 1987 the Swiss Federal Office for Public Health and the cantonal governments launched an AIDS prevention campaign that stressed the use of condoms. In 1987, only about 50% of adolescents would use any contraception during their first intercourse. The percentage was around 75% in 1993. The percentage of boys who claimed they used condoms on a regular basis increased from 22% in 1987 to 43% in 1992. There was a slight increase in the number of girls engaging in sex at the age of 15-16 years because of the increased availability of condoms. In several French-speaking cantons of Switzerland recently, workshops were set up with the objective of defining future actions regarding the health of adolescents. Girls had had the family planning clinics for many years to discuss sexual and health matters: in the future, either the family planning clinics or the health care structure should be available within the school health services as well as at discos, clubs, and youth centers. It is important to encourage discussions about AIDS and contraception. The current national policy is to encourage the use of both the condom and the pill. Despite concerns about HIV and pregnancy, sexuality is a human exchange that should bring happiness.