Off topic, but I had a logic philosophy class with Robert Causey and his book (he not only made us buy his book, he read out of it every lecture).
To explain causality A → B, he used the sentence "If it rains, then the streets are wet." He then droned on about rain and wet streets every lecture for the better part of the semester.
This was more than a decade ago. I am still haunted by wet streets and rain.