oh, and mad nuns can get their own subcategory:
Vanessa Redgrave in The Devils, who masturbated on the leg-bone of the man she accused of witchcraft, after she dug it out of the ashes of the pyre they burnt him to death on.
Hell, there was a convent full of mad nuns in that one:
Oh, and the nun driven nuts by sexual repression in Black Narcissus:
