nazaria rap music

Does rap music have a negative in packed on kid.I think it doesn't because most of the time you can't tell what they are saying you can't hear them.You think it is bad because the language but some kids parents don't let them listen to the songs because of the language.
Parents should listen to the song before saying that it is ok to listen to it.Some songs are not bad like jerk i doesn't get that but it doesn't say any bad words and it doesn't have violence.Some songs have a message to it like a book why do author write books to tell you a story some could be really or not who knows a lot of people say that it is bad or good i say both never judge a book by a cover all ways listen to it.