Smart, sharp, and sometimes painfully honest, Pearls Before Swine mocks the flaws and shortcomings of human nature with cynical humor. Stephan Pastis’s key to humor: “When in doubt, kill cute things.” Cartoonist Stephan Pastis’s 50,000,000 Pearls Fans Can’t Be Wrong is one collection that’s destined for the top of the charts. It’s pure gold, packed…