No? Well, it's quite a tale. You see, one day Lex Luthor called a press conference in Metropolis...except:
Anyway, the now free and publicly-known Erasmus goes on to set world on fire--in a good way!
See, there is no Erasmus. Lex used a piece of Red Kryptonite and super-science to turn Superman into an exact replica of Lex!! So he put Kal-El in prison, while he pretends to be his own good twin in order to build the public's trust!!
And now it's time for the good Erasmus to ask for everyone's iPhone passwords:
But Luthor's got a pretty good question:
From Superman Annual #9 (1983)