Bob Marley knew... "One good thing about music, is when it hits you, you feel no pain."
Love this Sublime cover of Trenchtown Rock:
Articles like that have been littering magazines for as long as I can remember. The first hint we all get about this in life is the lullaby...
Still, a few interesting links to be dug out of there.
Yeah, lots of pop psychology. (or pop-science/soft-science).
But, some of it we just know. I always ask what music people are into, for the same reason they said: gives you a lot of clues about the person.