Defective?

I have discovered that I can't keep track of any movie series that goes beyond 3 movies. If there's a first movie and a sequel and the second sequel, I can keep track of them or not. But after three movies I have no idea whether I've seen the movie or not. Have you seen the latest Spider-Man? I don't know. Have you seen the latest Avengers movie, or the latest Fast and Furious movie? I have no idea. I like the movies but I can't keep track. My brain is not wired for anything beyond three movies. They just blend together in my head they all seem like one movie and I can't tell them apart. And never mind the movies that go back to the beginning and start all over again. Those I really can't keep track of. I guess I'm just defective.