SulfonesPurinesPiperazinesPhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesErectile DysfunctionCyclic Nucleotide Phosphodiesterases, Type 5Homosexuality, MalePenile ErectionMethamphetamineVasodilator AgentsCyclic GMPGeorgiaUnsafe SexVersion, FetalTranslationsRisk-TakingTranslatingSexual BehaviorPsychometricsReproducibility of ResultsLanguageQuestionnairesCross-Cultural ComparisonFactor Analysis, StatisticalSoftwareQuality of LifeCultural CharacteristicsInternetAlgorithmsBrazilMolecular Sequence Data