All the more reason not to add mold from the shower and excess feces from every toilet flush to the list of things I have to worry about being on the mattress.

There are good reasons to keep bathrooms physically separated from where you sleep and hygiene is one of them, along with not wanting the bed to be a front row seat to the sights, smells, and sounds of whatever is going on in there and not wanting an expensive hotel room I'm paying for to be like a prison cell.