If you have dissociative identity disorder or split personalities, can you answer my questions?

I'm passionate about psychology, and I'm interested in learning new things.


What exactly causes split personalities to form?


Do these personalities talk to each other(are they even aware of each other)?


Does the person with the split personalities realize when other personalities take over?





I'd be interested in hearing from someone who either has this condition or if you know someone with this condition. thanks!