I don't think I'd ever do that - in any case, the last page of a complex story wouldn't necessarily help much. I do sometimes let me eyes stray to the end of a page or chapter, and then relax and enjoy how the narrative takes me there.
I do re-read novels very occasionally, so it's not essential not to know how it ends. It gives you more chance to see why and how the story turns out the way it does, and a good novel will still hold your interest.
As for films, plenty of people see films numerous times. I have enjoyed The Shawshank Redemption several times, although the first time was probably the best because it has such a splendid and satisfying resolution.
Recently my granddaughter was watching Titanic for the nth time, and I nudged her and whispered, "It sinks, you know!"