Cut the corn off the cob with a sharp knife - just cut along about the middle of the kernels. Then go back and get the 'milk' and pulp from each ear by using the dull side of the knive to scrape off what's left behind, working in strips with a downward motion. You should have a honeycomb appearance on the cobs, that is no corn or pulp or milk left on the cob, when you're finished. Heat the bacon grease in a non-stick skillet on medium heat and then add all the other ingredients, with the exception of the butter, salt and pepper, to the skillet. Cook, stirring often, for about 20 minutes and then add the butter, salt, pepper and sugar and give it another stir. Cook an additional five minutes, keeping it stirred and serve hot.