Remove the husks from the ears of corn, as well as pulling off the excess strings. Using a sharp knife, slice the kernels off the cob by cutting a bit off the end of the cob so you can stand it upright. Then slide your knife down the cob on each side to remove the kernels. Add the corn and water to a large pot or frying pan with high sides. Cook the corn over medium heat until there is no water left and the corn has softened. Add the butter and salt and gently fry the corn for 2-3 minutes to soften it further. Serve immediately.