However, if
your host has told you explicitly to leave the bed unmade, then follow their wishes. It’s their home, and it’s essential to be a considerate guest.
Another factor to consider is the length of your stay. If you’re just crashing for one night, it might not be worth the effort to make the bed. Your host is likely to clean the bedding anyway. But if your stay is more extended, say, a week or more, making the bed can be a nice gesture. It shows your appreciation for their hospitality.
