Caffeine is a stimulant. It causes your body to be jittery and jumpy. It is an unnatural substance in the body unless you concentrate it by using Coffee, big fuel, or whatever those spiky drinks that are super carbonated are these days. Anything that is unnatural to your body is okay so long that you thank GOD; after all, GOD created everything! It says so in The Holy Bible. Back in the days music was made by all people to create entertainment through drums, percusion instruments etc. Now we have audio players that sends digital sounds through the brains. I hear almost the same set of songs everyday and it continues to be happily listened to unfortunately or fortunately. For my mom she says I talk too much sometimes so I guess fortunately. hehe