It usually requires my permission, besides, Snow's a good tulpa! I don't mind if she takes over, it just gets annoying
I always had one..unintentionally. Well several....actually. Mostly just voices really. "WHAT WHAT?! PUMPKIN WHAT?!" I have no idea.
You mean like I let Shadow do when playing tennis (She is freaking awesome...though on occasions she has put my body (And sometimes my racket) through a bit too much "for the team")?
Yup, only with anything. Basically, I've learned from my tulpas that the body is really just a vessel, it's the conscious that drives it, and makes it act a certain way.