I listen to all music except heavy metal music
Why don't you listen to heavy metal? It has been around since the 1960's.
I know but it is not healthy to listen to such music
I can see your point, metal music is sometimes performed with aggression and machismo 
Did you know where the music originated from?
It was largely developed in the United Kingdom where it is still wildly popular today
I see. I will rather listen to Rap music rather than heavy metal
Heavy metal music
Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom. With roots in blues rock, psychedelic rock, and acid rock, the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion, extended guitar solos, emphatic beats, and overall loudness. The genre's lyrics and performance styles are sometimes associated with aggression and machismo.
In 1968, three of the genre's
a mixture of Dark Rock, Punk, Metal and Goth, there is something gripping, haunting and totally intense in all of the tracks. This is melancholy, and moody music ripping at your senses." 
"The album itself is one which I know I'll be revisiting to listen to again, and I think that will apply to a lot of people. Distorted, heavy, melodic but throughout allowing you relate what you're hearing to your own experiences, this album is more than just a moment in music