The science fiction writer Barry Longyear (Enemy Mine, Sea of Glass, Infinity Hold) once wrote on his website, in response to queries from his fans, that the most important part of a writer's anatomy was his - er, posterior (edited for family consumption). I would imagine that the back would be a very, very close second.
The way Lois figured out that Clark and Superman are the same person makes me think that Clark was desperately trying to let her see exactly that, despite what his conscious mind might have been saying. I think he wanted Lois to figure it out, and now that she knows, she'll redouble her efforts to uncover the dastardly scheme to run Superman out of town!
Of course, when you're fighting women who can disappear into light sockets and other such, it's going to be hard to catch them. But I imagine that their own jealousies and rivalries will help to trip them up soon.
And THEN we can watch Lois be mad at Clark.
