The older the dream is, the greater the chance that I've forgotten it, but this rule doesn't seem to apply while I'm dreaming. When I dream, no matter what I'm dreaming about, I can actively recall the first time I've had a wide array of, what should be, long forgotten dreams. Has anyone else experienced this? Is there an explanation for it?
I've had that happen. I had a dream that I remembered that I had when I was 5. I don't think there's really an explanation for it, I'm guessing you keep your dreams stored somewhere in you unconscious brain, and when they resurface you know exactly what's going on.