High exposure to lyrics that describe degrading sex is associated with high levels of sexual behaviour in teens, a new study suggests.

The research, published Tuesday in the American Journal of Preventive Medicine, was conducted in three large urban high schools in the Pittsburgh area, and involved asking Grade 9 students about the number of hours a day they listen to music and their favourite musical artists.

STDs are particularly problematic in poor communities, Primack said, and that was a reason for focusing on three urban high schools where about half the kids take part in a lunch program — indicating they fall below a certain income level.

“We divided the cohort into three … those who were exposed to the lowest amount (of music with degrading references), those who were exposed to sort of the medium amount, those who were exposed to the most,” he said.

“And those who were exposed to the most were more than twice as likely to have had sexual intercourse, and that’s even controlling for all of the other factors that we looked at that we thought might be related to uptake of sexual intercourse.”

Daniel Levitin, a cognitive neuroscientist at McGill University in Montreal, said the study “clearly adds to our body of knowledge about the connection between musical lyrics and … experiences of young people.”

But Levitin, author of the bestselling book “This is Your Brain on Music,” said the study wasn’t designed in a way that it could tell us about any causes of the young people’s behaviour.

“The important thing to bear in mind is whatever it is that’s causing young people to engage in increasingly risky sexual activity at a younger age — we don’t know whether there’s some third factor out there in the world that’s causing them both to engage in that activity and to seek out this music.”

JUst play the song backwards and thge teens will do their himework and cut the grass without being told.