This goes for anyone in any house. I’ve had a few friends and one girlfriend who had an issue with not closing the bathroom door when they were doing their business. I’m not sure if that meant they were that comfortable with me. If they were, then that’s great but honestly, I don’t need to see them doing their business. Especially my ex-gf. There were some mysteries I didn’t want to know about. (Like whether or not she actually pooped or not. But I know, everybody poops.)
And that goes the other way too. I don’t need someone bursting into the bathroom while I’m doing my own business. This has happened once. But only once and I’m no longer with her.
So what about you? Do you leave your door open or closed while going to the bathroom? I don’t count showers in this though, only because you can hide behind the shower curtain and there are usually no embarrassing sounds involved.