This was a short, sharp shock of a show from Marc Jacobs: just four minutes long, but with plenty of ideas about how to wear color this fall (brightly and in unexpected mixes), how to layer jewels (obviously faux and in big pile-ups at the neck or accessorizing a belt at the waist), and how to go bare and short—like, really short—with opaque bodysuits and stockings underneath your bustiers and minis. And don’t forget your lipstick.