Every culture has it's own “thing” where food is concerned. Just as food varies from region to region, so does the etiquette surrounding both eating grub and serving it to guests. For example, in China it's considered rude to finish all of your food because it implies that the host didn't serve you enough. In Japan, the slurping our elders chided us for is perfectly normal, and even encouraged - the noisy practice actually helps to cool down hot noodle soups. Guest-related etiquette is a little…