Study claims to link vulgar lyrics to early sex by teenagers

Personally, I find this a little hard to believe without better evidence. It reminds me of when I was growing up in the Sixties, and our elders were blaming everything on the Beatles, whether it was drinking, sex, drugs, or anything else they didn't like about teens.
Did it ever occur to these people that perhaps sexually active teenagers were more drawn to explicit music? There are too many times when the horse and cart are transposed by a study, especially if the sponsor of the study has a personal agenda. I don't see enough concrete evidence to draw the conclusion that music causes promiscuity, any more than video games are responsible for violence.
Just my opinion.