Music comes in many ways. It could be about rap, pop, classical, blues, jazz, and hip-hop. Some songs tell you what the writer which is most of the time the singer, is feeling. And instead of talking about it they sing about it to make them self feel a bit better. Their is also cultural music, Japanese, Chinese, Indian, etc. Those songs can be from along time ago and may also be used to tell a tale from way back when about a war, fantasy, or maybe even something that is scary.
