Working in retail makes you develop a thick skin, as you have no choice but to deal with people who have obviously never heard the word ‘no’ in their entire lives, let alone been taught basic manners. Anyone who has worked in customer service of any kind will be sure to tell you that the number of times they've been told, ‘I’ll never shop here again!' would surmount the times it was actually true. In other words, people like to talk, but they don't put their money where their mouth is. One cust…