There is actually a phrase for this that I learned inmy film class, way back in college. It is the willing suspension of disbelief. It works, too.
PamelaDelafield wrote:
Funny how in all the old alien movies, aliens wear skimpy, metallic colored clothing usually with capes, and the aliens are always the bad guys. Then we went through a spell of aliens who eat humans. I wonder how they developed a taste for humans if they evolved without ever eating humans? It's like us having a need to eat aliens. As unscientific and laughable as they were, I still loved the old sci-fi movies when I was growing up.