Because it is grabbed from the deepest pits of the burning furnaces of emotion. Crafted by steel warriors and epic blacksmiths. Cast upon the people by magical mages and incredible trolls.
That's why
Quote by Chrisiphone
Oh wow this is a guitar forum!
Quote by JacobTheMe

Karvid is sexy

Quote by KAS1981
Why is it that some folks quote praise from other members in their sig lines?
Its lame.
Quote by PINK_F_L_O_Y_D
wtf is an epic blacksmith?

A blacksmith that's epic.

What else?
i always found this to be fascinating from an evolutionary standpoint. Unfortunately, i have no idea as to why it's pleasurable to us.
It stimulates an emotional response. Music which sounds good to some sounds bad to others. Therefore it is subjective and dependent on the individual's upbringing.

Some people don't like music at all.