Possible Clues:

• Tchaikovsky's First Symphony covers exciting material
• Album on whose cover Madonna's features were appropriately blue
• Porn from ace trio reprinted
• Sexy writing
• Creative porn
• 1992 Madonna album featuring her Mistress Dita persona
• Anais Nin's "Delta of Venus," e.g
• Where Ruth is wrapped by Heather in blue material
• Art form Liszt's last symphony covers
• Woman binding books, works of an explicit nature