The first filk song that I stumbled across on the internet was to the tune of the Irish Washerwoman, and it was a song to a dragon... called "Do Virgins Taste Sweeter?" I gave a copy of it to a friend who does such songs, and now I realize that I didn't bookmark the sites, it was about a year ago, and I have no way to find it again. The gist of the lyrics were, If virgins taste sweeter than those who are not, then we'll be sure to have no virgins around for the dragon to eat.