This week: Actress Eva Mendes decodes her new film – and hieroglyphics… Writer and “SNL” vet Julia Sweeney answers your etiquette questions from the fetal position… New Orleans indie rockers Generationals spin a sweet-and-sour soundtrack… Science writer Mary Roach (“Stiff,” the new “Gulp”) takes us on a field trip down the alimentary canal… Twitter queen Kelly Oxford tiptoes into David Copperfield’s private lair… And Wrigley’s Gum inspires a cocktail that WON’T lose its flavor. Plus, salt mines in the sky, self-hating jokes, and a new Rogue Wave.