Just think about this scenario: You are riding at the left side of the road and got a little bit distracted by the music and indadvertedly drifted to the right and didn't hear the approaching super fast cyclist behind you screaming "at your left" but you didn't hear him/her since you were listening to music on your headphones. The upcoming cyclist may be able to maneuver the bike and don't crash into you. If the cyclist is a newbie like myself still learning how to handle the bike in emergency situations, chances are that I'm going to crash either into you or other approaching objects/people. In my case, music makes me nervous instead of relaxing me because it deprives me of my hearing sense. Headwind also makes me nervous that's why I used a small rearview mirror to be sure that nobody is approaching me when I'm going to pass other cyclists or people. I still look back no matter what. I think this is a matter of safety (first) and education. Some states offer classes about road cycling and safety. In Florida the FL bike association offers clinics about cycling savvy which includes, safety, bike handling in emergencies and a 3 hour classroom session were other important topics are discussed as well. Check the internet to see if you can take advantage of courses offered in your area.

