It's kind of spooky knowing that's a part of a human being.
Knott's Scary Farm (from late September through early November) transforms the park into a haunted house, with a variety of spooky areas and decorations that reflect the spirit of Halloween.
Reasons why you might want music created especially for Halloween can include wanting to create a spooky atmosphere or make the theme of the party tie in with the music as well as the decorations and costumes.
Bonus Hint for Earning "Magi Coins": Raise your Sim's "Logic" skills to their fullest extent and go to a lot in Magic Town with "Electro's Spooky Laboratory" (or build one into a lot).
Special effects contacts range from circle lenses in realistic colors that make your eyes look much larger and doll-like to black or white sclera lenses that can be quite spooky and give you a haunting stare.