And, of course, there's the precedent of him daydreaming about them having dinner together and Lois telling him to stop faffing about and get on with it (or words to that effect <g>) in...er...was it Phoenix? I know, I know, I should be ashamed of not knowing this.
From there - and just knowing Clark's character, plus that line that Pam quotes, which is rather telling <g> - it's easy to extrapolate, I think, that he probably does a lot of fantasizing about Lois in his spare time.
LabRat
