Why: If you’ve been smooching at Marine Drive, you’re probably familiar with the contours of these four-footed rocks. Tetrapods, one of Mumbai’s most under-used icons have inspired design collective Bombayography to create mini cement versions that will serve as paperweights. Hot and heavy! Run by an MIT guy, a product developer and ad executive, Bombayography’s next project involves quilts embroidered with city ward maps. While you were sleeping…