The Torture Chamber at the Castello di Amorosa.
Creative Commons AttributionThe Torture Chamber at the Castello di Amorosa. - Credit: David Ball
This visceral title suggests a passage of some kind.  Given the major themes of the story, one cannot help but think of women's bodies, and metaphorical associations with the acts of childbirth and menstruation, as well as the loss of virginity. More literally, of course, it describes the torture chamber of the Marquis.  These two interpretations could be said to represent the tension between the realities of female experience, and the tyranny of cruel, patriarchal behaviour.  Using this as the overall title for the book therefore imbues the whole collection with this idea.  
Creative Commons AttributionPregnancy - Credit: Sean McGrath