Erectile DysfunctionHypogonadismPenile ErectionImpotence, VasculogenicPenisSulfonesPhosphodiesterase 5 InhibitorsPenile ProsthesisPurinesPhosphodiesterase InhibitorsKallmann SyndromeCarbolinesPenile ImplantationTestosteronePiperazinesLibidoPriapismAlprostadilSexual Dysfunction, PhysiologicalSexual Dysfunctions, PsychologicalPuberty, DelayedPenile IndurationUrological AgentsCyclic Nucleotide Phosphodiesterases, Type 5TriazinesPapaverineEunuchismHormone Replacement TherapyErgoloid MesylatesEjaculationVasodilator AgentsCoitusSex CounselingKlinefelter SyndromeUrologic DiseasesAndropause3',5'-Cyclic-GMP PhosphodiesterasesGonadotropinsOrgasmGonadotropin-Releasing HormoneButeaGynecomastiaEndocrine System DiseasesVentricular Dysfunction, LeftTreatment OutcomeAndrogensDAX-1 Orphan Nuclear ReceptorPrevalenceReceptors, LHRHAmenorrheaRisk FactorsVacuumInjectionsOlfaction DisordersUrethraSet (Psychology)HypopituitarismFollicle Stimulating HormonePremature EjaculationLuteinizing Hormone, beta SubunitCHARGE SyndromeLeuprolideLuteinizing HormoneTribulusQatarEpimediumInfertility, MaleQuestionnairesProstatectomyPenile DiseasesPatient SatisfactionSeverity of Illness IndexApomorphineUrination DisordersAgingCarthamusCynomoriumSex Hormone-Binding GlobulinPhentolamineHypothalamic DiseasesDouble-Blind MethodCardiovascular DiseasesImidazolesEndothelium, VascularMen's HealthSyndromeLepidiumNitric Oxide Synthase Type IProstatismDisease Models, AnimalTime FactorsUrinary IncontinenceProspective StudiesPubertyDiabetes ComplicationsNitric OxideGonadotropins, PituitaryAdrenergic alpha-AntagonistsKisspeptinsMuscle, Smooth