I suppose, because I'm not that experienced, that's the reason I have some problems while travelling. Once I remember to think of where I want to be instead of acting like I have a physical body, I can usually navigate.

Here is an example of some things that happen to me: I get stuck in ceilings, walls, and doors. I can sometimes touch things. I have materialized (at least visually appeared) to other people at least once.
One time, I picked up a book and was able to flip the pages.

This morning in the wee hours I found myself in someone's home. I actually banged into a door. I was afraid I would materialize and then what?

Why the physicality? Is it because I am on the real-time earth plane? Just what is the physical part of me that can move objects or touch objects???