When a woman tries to outwit her husband's sexy young mistress, the unexpected consequences include starring as King Lear in a very amateur production - with the mistress, an aspiring actress, playing The Fool.
A pathologist's book about his work is a good recipe for sick people.
A brother and sister with a past incestuous relationship have a current murderous relationship. He murders the women who reject him and she murders the women who get too close to him.