Can you not empathise in even a small part with the aesthetic aversion many people have to contaminating things with used currency?
Are you sure you didn't just go ahead and basically make up these people who don't want money to touch their book because it's dirty?
I've known at least a couple people who found it yucky to handle cash right before a meal for that same reason.
Another month has passed and here is a new rationality quotes thread. The usual rules are: