Some people believe that MPD/DID/OSDD deliberately forget. I know that some times all it would take for me not to forget, is to have someone who understands communicate with me. I know that I would not loose some memories if I had a significant other who talked to me on a regular basis and reminded me of things that I said or did. I cannot explain the why. I know that the amnesia is not deliberate but is a subconscious thing. Something happened during the first three years of life that was so traumatic we automatically forgot. Then, we must have gotten traumatized again and automatically forgot. The brain got damaged. The automatic forget mechanism now has no logic. It happens even if there is no trauma.