Sad eyes is actually Robert John.
RE: Making new lyrics, a few years ago, my wife, brother and I pulled an all nighter drive down south. About 2am, we turned on a country station. He knew Country music, but I wasn't a fan at the time. We spent about 6 hours driving and making up the words to new songs. It was amazing how close he and I were as we were improvising the words.
Sad eyes is actually Robert John.