A Monster in my Haskell

Here is a wonderful post by Andrew Pimlott, which introduces monads as monsters. Very appropriate for Halloween. Snippet:

(>>=) should be read as the monster on the left expelling values through its rows of teeth and over its tongue at the function on the right. (Its pronunciation is a sort of bestial hissing that is difficult to describe; when you say it correctly, the terminal may become slightly moist.)