Go listen to the song "I Can't Stay Away" by the Veronicas. It's so innapropriate without being graphic. I love it. It totally inspired the entire plot of The Duff.
And Matt Nathanson's "Come On Get Higher" is sexy without being vulger. Actully, it's beautiful. I want that on a soundtrack one day.....but it's more erotica than YA, I think. lol