This might seem ridiculous, but I become very aware of this feeling when I buy a new phone or computer for the first week or so or if I use someone else's phone or computer.

New devices feel foreign and strange for a bit until they're configured and setup properly and you get used to the new features or speed or whatever.

Whenever I use someone else's phone or computer, I always feel like I need to be careful not to intrude, avoid the gallery, texting apps, email apps things like that. Stay out of the documents and random storage folders and stuff.

It gives me the same feeling as being alone in someone else's house. If I go through that kind of stuff it'd be like rummaging through their drawers or their bedroom or something.