> I have a 4-bedroom, 3 bath house, and we use them all. This tends to be more or less valid for any resource in the house (extra room, closet, etc.). And as i

> I have a 4-bedroom, 3 bath house, and we use them all. This tends to be more or less valid for any resource in the house (extra room, closet, etc.). And as it stands bathrooms are on the important side. If you had one bathroom per resident they'd still all be used simply because the people would thoroughly enjoy not having their stuff moved around or bothered by anyone else, or ever risk having to wait for someone to get out first. So you'd just have "assigned" bathrooms. You could even have an extra one that can come in handy when you are remodeling or simply experiencing technical issues in one of the others.