Penile ErectionSulfonesPurinesCanadaErectile DysfunctionPenisPiperazinesPhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesPriapismCyclic Nucleotide Phosphodiesterases, Type 5Contraceptives, OralImpotence, VasculogenicContraceptives, PostcoitalLibidoVasodilator AgentsPenile IndurationContraceptives, Oral, CombinedOrgasmContraceptives, Oral, HormonalCyclic GMPHomosexuality, MaleEjaculationMethamphetamineOntarioAlprostadilPapaverineContraception, PostcoitalGeorgiaContraception BehaviorApomorphineContraceptive Agents, FemaleBritish ColumbiaContraceptionAlbertaSexual BehaviorCoitusMedication AdherenceDrug PackagingEthinyl EstradiolPenile ProsthesisContraceptive Devices, FemaleQuebecPenile ImplantationDesogestrelQuestionnairesContraceptives, Oral, SyntheticTime FactorsYawningManitobaNepetaUnsafe SexSexual Dysfunction, PhysiologicalDrugs, Chinese HerbalNova ScotiaPatient ComplianceUrologic Surgical Procedures, MaleContraceptive DevicesAphrodisiacsContraceptive AgentsCopulationRisk-TakingTreatment OutcomeTabletsNorthwest TerritoriesHealth Knowledge, Attitudes, PracticeCarbolinesErgoloid MesylatesInjectionsArctic RegionsNitric Oxide Synthase Type ISaskatchewanNunavutNorpregnenesNorgestrelPregnancyInuitsRisk FactorsCross-Sectional StudiesMenstruationPenile DiseasesNewfoundland and LabradorPressureIntrauterine DevicesRats, Sprague-DawleyMethoxaminePhentolaminePatient SatisfactionTestosteroneHypogonadismPlacebosDopamine AgonistsFamily Planning Services