Trichomonas VaginitisTrichomonas InfectionsTrichomonas vaginalisSexual PartnersSexually Transmitted DiseasesSexual BehaviorTrichomonasAntitrichomonal AgentsCoitusInflammationNimorazoleTritrichomonas foetusMetronidazoleVaginaCandidiasis, VulvovaginalUnsafe SexGonorrheaVaginosis, BacterialHIV InfectionsHomosexuality, MaleVaginal DischargeVaginal DiseasesSexually Transmitted Diseases, BacterialCondomsVaginitisSmegmaHeterosexualitySexually Transmitted Diseases, ViralPrevalenceGenital Diseases, FemaleRisk-TakingProstitutionProtozoan Infections, AnimalSafe SexHomosexualityRisk FactorsChlamydia InfectionsUrethral DiseasesProtozoan InfectionsCross-Sectional StudiesHIV SeropositivityVaginal SmearsAdolescent BehaviorContraception BehaviorBisexualitySyphilisInflammation MediatorsSexual AbstinenceContraceptive Devices, MalePregnancyQuestionnairesHealth Knowledge, Attitudes, PracticeParasitologyLung Diseases, ParasiticTruth DisclosureNitroimidazolesCervix UteriGardnerella vaginalisSex EducationUrethritisChlamydia trachomatisContraceptionPregnancy Complications, InfectiousPapillomavirus InfectionsLogistic ModelsSubstance-Related DisordersTinidazoleDyspareuniaUrethraPregnancy in AdolescenceContraceptives, Oral, SyntheticLubricantsCondoms, FemaleInterpersonal RelationsMasturbationAcquired Immunodeficiency SyndromeAlabamaContact TracingAntiprotozoal AgentsProspective StudiesSexualityAge FactorsHIV SeronegativityInterviews as TopicRapePapillomaviridaeSelf DisclosureGenital Diseases, MaleSocioeconomic FactorsPenisCohort StudiesNystatinUnited StatesExtramarital RelationsSpouse AbuseOrgasmSan FranciscoPolymerase Chain ReactionAfrican AmericansIncidence