Me: So. We're writing this chapter in A's point of view okay.
Brain: Okay!
Me: *struggles to write* 
Brain: Uhmmm.
Me: *eye twitch* Ummm?
Brain: What if....we write from B's point of view?
Me: *groans* *tries it* *writes easily* *glares at brain* Why didn't you tell me this from the beginning!
Brain: Because you wanted to use A's point of view!