Hap, it is funny - no, make that *hilarious* - that you mentioned this. I was, just this moment, thinking "What if Clark had sexsomnia and was 'sleep-walking' to Lois' appartment?" While contemplating whether to attempt such a story myself or foist it on someone else, it occured to me that a cute title would be "While You Were Sleeping." That very second, I clicked on the boards and saw your challenge.
So maybe I'll try it, though I can't make any promises.