PenisCondomsPenile NeoplasmsSafe SexContraceptive Devices, MaleSexual BehaviorSexually Transmitted DiseasesPenile ErectionSexual PartnersProstitutionRisk-TakingContraception BehaviorHIV InfectionsUnsafe SexHealth Knowledge, Attitudes, PracticeErectile DysfunctionCoitusNegotiatingClitorisSex WorkersPenile IndurationBalanitisGenitalia, FemaleSex EducationPriapismScrotumCircumcision, MalePenile ProsthesisCopulationGenitalia, MaleHeterosexualityUrologic Surgical Procedures, MaleSexual Behavior, AnimalQuestionnairesHomosexuality, MaleCross-Sectional StudiesSexual AbstinenceSex FactorsTuberculosis, Male GenitalAdolescent BehaviorEquipment FailureContraceptionSex CharacteristicsContraception, BarrierGenital Diseases, MaleHypospadiasRisk Reduction BehaviorGenitaliaRisk FactorsSocial MarketingNamibiaSelf EfficacyPenile ImplantationSex CounselingContraceptive DevicesContraceptive Devices, FemaleSouth AfricaIntentionSpermatocidal AgentsInterviews as TopicReproductionLogistic ModelsAcquired Immunodeficiency SyndromeWomenMasturbationLubricationAfrican AmericansPrevalenceUrethraPregnancyPerineumBisexuality