I dunno, I pretty much agree with Commander Courage. Thing is, I believe he's right about the time-reversal thing - the Lester kiss would only erase Lois' memory of her being with Superman. And who Superman is, of course.

A whole fuss is made about not making certain choices that will allow STM, SII and SR to sit better with themselves. I believe that leaving the Lester kiss scene in, no matter how corny it might be, is the only way to allow SR happen as it did. The time travel might be a good device, but its TOO DAMN CONFUSING at that. And its a repeat from I, so...