

blowing the butt trumpet has been an embarrassing thing for millennia
This is not correct. There is a Martin Luther qoute (around 1500) that goes something like “why don’t you burp or fart? Wasn’t the meal to your liking?” The Romans made the latrine a social gathering. The need for butt trumpet privacy is fairly recent.









Could it be the books are wrapped to protect against humidity? This may not be the whole reason why they do it but it wouldn’t be the worst one.