An interesting thing like a fart in history

This story came up in my feed. It is rather weird, but so weird, how can I not mention it and do a Google search? Naughty Nuns, Flatulent Monks, and Other Surprises of Sacred Medieval Manuscripts More funny manuscript art British Library has an amazing collection of illustrated manuscripts. 

Japanese fart wars?

More bizarre art, I guess they just called it like it was?