I put several in each bathroom plus a stack in a linen closet. But get this question a lot. My rule of thumb is: one time a stupid question equals stupid guest, two times a stupid question equals stupid host.
Are the towels better placed on each bed? Where do you leave them? Are instructions on where to find them in the welcome message an overkill?
Now I am also worried that one of these people will report me for a missing amenity. And we all know that a house with no towels is for sure a party house. In all fairness to my guests, I am currently at an airbnb myself and just messaged the host on how to make it warmer. There is a giant instruction sheet taped right across from where I am seating. I have never seen a central heat boiler like this before so did not even think to look there. If you see a new post on this board with something like: heat instructions in visually impaired font are posted on the boiler but Superhost still asks how to make the place warmer. What to do?- you will know it is about yours truly