Or, ditch the kiss thing altogether. Lois doesn't really *need* to forget. It's only a movie...
Right. If they (the creatives forces behind the Donner Cut) were going for the best possible story, letting Lois retain the secret would have been the way to go. It's not like they'd have to follow up on it in a sequel. Instead, they were so biased against Lester and so adament on "following the original script" that they just cut-and-paste the ending of S:TM and negated the events of the entire film. That's just bad storytelling.