Come to think, I remember a brief little ficlet in the archive wherein Lois discovers that her husband is Superman, so to get even, she comes on to Superman and then pretends to Clark that she and the superhero were having an affair. I don't recall the title, though.
Possible circumstances that could lead to Clark not telling his wife:
1. He lost his powers long ago, and figured it would not be an issue anymore
2. He has amnesia or a dissociative disorder
3. He is just *that* much of a lunk-head
Edited: Had the wrong emoticon and didn't even realize. :rolleyes:
