Teenagers listen to an average of nearly 2.5 hours of music per day.Guess what they’re hearing about? One in three popular songs contains explicit references to drug or alcohol use, according to a new report in The Archives of Pediatrics and Adolescent Medicine. That means kids are receiving about 35 references to substance abuse for every hour of music they listen to, the authors determined. While songs about drugs and excess are nothing new, the issue is getting more attention because so many children now have regular access to music out of the earshot of parents