To me it shouldn’t matter, but it feels weird having the bathroom door open all the time. Also my shower sometimes does a midnight clunk for no obvious reason and it’s loud.
I never really thought about it until now, since I’ve never lived in a “master bedroom” with attached bathroom until now. Still on the fence, leaning towards keeping it open for convenience and airflow/dehumidification more than anything. Obviously I shut it after things get smelly.
Human monkey brains like enclosed spaces for security especially when we are the most vulnerable. Closed doors gives you the impression of safety.
And on top of that I have a window in the bathroom that’s not have any balckout curtains on it. So it needs to be closed, else I would wake with the sun. And that’s not a desired outcome.