▁and ▁the ater ▁performances . ▁She ▁explains ▁how ▁the ▁the ater ▁is ▁much ▁less ▁threaten ing ▁and ▁does ▁not ▁produce ▁the ▁same ▁fear ▁that ▁gender ▁performances ▁often ▁encounter ▁because ▁of ▁the ▁fact ▁that ▁there ▁is ▁a ▁clear ▁distinction ▁from ▁reality ▁within ▁the ▁the ater . ▁ ▁Butler ▁uses ▁Sig mund ▁Fre ud ' s ▁notion ▁of ▁how ▁a ▁person ' s ▁identity ▁is ▁mode led ▁in ▁terms ▁of ▁the ▁normal . ▁She ▁revis es ▁Fre ud ' s ▁notion ▁of ▁this ▁concept ' s ▁applic ability ▁to ▁les bian ism , ▁where ▁Fre ud ▁says ▁that ▁les bi ans ▁are ▁model ing ▁their ▁behavior ▁on ▁men , ▁the ▁perce ived ▁normal ▁or ▁ideal . ▁She ▁instead ▁says ▁that ▁all ▁gender ▁works ▁in ▁this ▁way ▁of ▁perform ativity ▁and ▁a ▁representation ▁of ▁an ▁internal ized ▁notion ▁of ▁gender ▁norm s . ▁ ▁G ender ▁Tr ouble ▁( 1 9 9 0 ) ▁ ▁G ender ▁Tr ouble : ▁Fem in ism ▁and ▁the ▁Sub version ▁of ▁Identity ▁was ▁first ▁published ▁in ▁ 1 9 9 0 , ▁s elling ▁over ▁ 1 0 0 , 0 0 0 ▁copies ▁intern ation ally , ▁in ▁multiple ▁languages . ▁The ▁book ' s ▁title ▁all udes ▁to ▁the ▁ 1 9 7 4 ▁John ▁W aters ▁film ▁Fem ale ▁Tr ouble , ▁which ▁stars ▁the ▁drag ▁queen ▁Div ine . ▁G ender ▁Tr ouble ▁discuss es ▁the ▁works ▁of ▁Sig mund ▁Fre ud , ▁de ▁Beau voir , ▁Julia ▁Kr iste va , ▁Jacques ▁Lac an