This has been an issue for me for many years as a guitar player. I see many musicians that produce what I see as beautifully crafted music, but at the same time it has a message that is not biblical. One could argue, and it could be a strong argument, that if a song has an umbilical message, then the music itself is not beautiful. I'd like to learn some of these unchristian songs simply to learn the songs, and maybe improve my song writing in the process, but I'm very reluctant to.