Why Do People Prefer ‘Music’ in Certain Moods?

Imagine you're feeling really sad, and then you hear a song that makes you feel even sadder. That's not a bad thing, it helps you feel the sadness, which can make you feel better once it's over. On the other hand, if you're excited and you hear a happy song, it adds to your joy! Music is like a friend who knows how you're feeling.