Is there a way to limit a tulpas access to your mind?

[Nevermore]

 

Nonsense, just give in an effort to force 'you know all of my memories now except for all of my sexual ones, like masturbation and blow jobs'.

This entire thing is mind-based anyway. Nothing is stopping you from doing stuff like this.

 

I suppose, I just guess it depends on your level of commitment when doing it.

[Captain Nemo]

Depends on your level of belief. If you think it'll only half-work, then it will. If you know, on the other hand, that your tulpa won't be able to access those memories you kept from them, then they won't.

[Fenrir]

Why not let it see, who's it gonna tell