Family members can't be in the same bathroom

I actually am from the US. Lol just considering females always seem to go to the bathroom in groups you would think especially in the case of twins there wouldn't be an issue. Plus it being a game where you can't constantly control where they go that they wouldn't get so uncomfortable and take so long to decide how to react. If I walked in on someone I'd just say oh sorry and backout closing the door. Then go right to another bathroom. I wouldn't be embarrassed and lose all sense of reason and direction.