Just heard on NPR, in the course of a story about how stoical and grateful Haitians getting emergency medical help are..... a doctor says she's not going to be patient with Americans who complain at getting a second needle stick. [Getting care in America] is like being in a four-star hotel with champagne.
Even supposing that Haitians have a superior reaction (stoicism is useful in some ways, but pain is frequently a signal that something is going wrong) it isn't reasonable to expect people to reliably have an emotional reaction which isn't supported by their culture.
Also, we will note that the doctor wants her patients to accept more pain so that she doesn't have to deal with the inconvenience of being told about what they're feeling. Complaining about complaining is still....complaining.