When I was 17, I decided to watch Debbie Does Dallas on a whim. While it is definitely an overrated porno, it isn't what I'd call terrible either.
But there was one thing that made it much more difficult to get through. Nearly every goddamn sex scene in the movie has this song in it, and my dick went soft every time it was played. Upon relistening to it, it is a moderately good instrumental rock song, but it just DOES NOT work as porno music.