This is the Link to the origional research.
PITTSBURGH, February 25, 2009 (LifeSiteNews.com) - Researchers at Pittsburgh University School of Medicine have found that teenagers who regularly listened to music with explicit and aggressive sexual phrases were twice as likely to be engaged in sexual activity compared to those who avoided such music.
Writing in the American Journal of Preventive Medicine, lead researcher Dr. Brian A. Primack said, "This study demonstrates that, among this sample of young adolescents, high exposure to lyrics describing degrading sex in popular music was independently associated with higher levels of sexual behavior.
"In fact, exposure to lyrics describing degrading sex was one of the strongest associations with sexual activity … These results provide further support for the need for additional research and educational intervention in this area."
The press release from the American Journal of Preventive Medicine announcing the results of the study points out that sexual activity among adolescents in the United States results in over 750,000 teenage pregnancies each year. With reports of up to 25 percent of all female adolescents in the US having sexually transmitted infections, researchers and public health officials are looking for those factors that might increase sexual activity in teens.