PunishmentChild RearingFather-Child RelationsParentingChileChild AbusePenisMother-Child RelationsPenile ErectionInternal-External ControlGames, ExperimentalPriapismAltruismErectile DysfunctionCapital PunishmentPenile ProsthesisGame TheoryCooperative BehaviorSalivary Proteins and PeptidesRewardReinforcement (Psychology)