On the night where the moon is square, women in the small town get very horny and attack their men. Which leads us to this page, where the woman trying to break in has gotten huge and her libido will flatten her men. The punchline at the bottom shows that children born during the square moon will be cubes. Which isn’t really all that funny.

(Heavy Metal issue #135, November 1991 – Page 80 Full Moon in the Carpathian Mountains by Boucq)