Lou - someone wise like Wonka can better give you the MLCer pov.

The lack of attraction I believe is due in part to their depression. A MLCer seldom goes off with a younger version of their long term spouse/partner. In fact my middle son could not believe the woman my xh originally left me for. She was very different and according to him, not at all attractive.

So when the fog lifts, and the depression is seen for what it is (all too often MLCers fail to realise they are in fact deeply depressed) it seems that old feelings may return.

But then there is denial . . . . and loss of memory.