Batman is a human in a face-covering costume, so it's natural to wonder what he looks like underneath, and assume he has some other name and life.
But Superman is a superpowered alien who shows his face - why even think that he has an ordinary life somewhere on Earth as a human? In the various DC continuities, is the idea that Superman has another identity widely believed?
BATMAN: By going maskless as Superman, you divert most people from thinking you might spend part of your time as someone else. After all, it's not likely you'd wear a mask in civilian life.
Adventures of Superman Vol. 1 #440 (May, 1988)
SUPERBOY: See, the Bat-guys--they wear masks and slink around in the dark, but with us S-guys--we're all about truth! I mean, we keep other people's secrets, but when it comes to us--everything's on the table! No disguises, no secret I.D.'s...
STEEL: I don't know, kid--sometimes I wish I still had a secret identity.
SUPERGIRL: And... and how can we really know that, say, Superman--or any of us--doesn't have one?
SUPERBOY: Excuse me--Superman? If the Big Righteous "S" had a secret life, we'd know 'cause he woulda told us!
Team Superman Secret Files and Origins Vol. 1 #1 (May, 1998)
SUPERMAN: My name... I'm really nervous... my name is Clark Kent. I'm a reporter for the Daily Planet. And this is really not easy for me... so feel free to say something.
GREEN LANTERN: He doesn't... wear a mask. I never even... thought he had a... day job.
JLA Vol. 1 #50 (February, 2001)
No, as only his very closest friends know that he is Clark kent, but there was a time when he exposed Himself publicly as being Clark kent, but Manchester Black used his mental powers to give everyone amnesia on that. One interesting truth is lex did at times discover that he was Clark, butr always thinks that is fake news, as no way Superman would ever allow Himself to act as that timid and weak Clark kent
