A terrific write-up about the song and its video
A bit of trivia: I was in sixth grade when this song was at its zenith. As I went to Catholic school, we kids were not permitted to sing this song on the playground or at lunchtime or whenever...not even the "na na na na na na" part.
The funny part is that I was so very sheltered and innocent still that I had no idea what the song was actually about, but since the nuns had such a hard time with it, I actually asked my mother what the big deal was.
And my mother, as always when it came to such matters, was honest with me.