This week: Filmmaker, writer, and ‘Pope of Trash’ John Waters offers etiquette advice, naturally… Jenny Slate, star of the film “Obvious Child,” says ‘complicated’ and ‘comedy’ can coexist… Swedish sister duo First Aid Kit bring board games and tacos to their dinner cozy party … When we’re hungry, why do we get ‘hangry’? … From Panama to Pan Am: novelist Cristina Henriquez remembers a nation in revolt, then we learn about the ‘Jet Age,’ when coach was actually classy… Mailing your kid to granny’s house was actually legal?! … Plus: Vanity Fair columnist Richard Lawson, new New Pornographers, and keeping tabs on a penguin.