Erectile DysfunctionSexual Dysfunction, PhysiologicalSexual Dysfunctions, PsychologicalSexual BehaviorCondomsLibidoSexual PartnersUnsafe SexRisk-TakingOrgasmHomosexuality, MaleSafe SexProstitutionQuestionnairesSexually Transmitted DiseasesSexualityHIV InfectionsHealth Knowledge, Attitudes, PracticePenile ErectionEjaculationDyspareuniaSex CounselingUrination DisordersGonadal HormonesNeurodermatitisEroticaPremature EjaculationCoitusHyperprolactinemiaThiazidesHypogonadismPenisVentricular Dysfunction, LeftSexologyQuality of Life