Suisse (1) Doors (1) Prevention (1) Communication (1) Methods (1) Surveys (1) AIDS (Disease) in women (1) Couples (1) Teenagers (1) Sexually transmitted diseases (1) Sexual intercourse (1) Sex customs (1) Screws (1) Questionnaires (1) Perspective (1) Originality (1) Negotiation (1) Licenses (1) Evidence (1) Contraception (1) AIDS (Disease) (1) Methods (1) Use studies (1) Use studies (1) Research (1) Prizes, etc (1) Attitudes (1) Sexual behavior (1) Relations (1) Protection (1)