I heard someone singing "I'll never be your pizza burning" instead of Mick Jagger's original line "I'll never be your beast of burden"....Line from "Bobby McGee"....."I took my harpoon out of my dirty red pajamas"....I now sing the song that way if I can get through with a straight face...if not, who the hell cares?
Someone near and dear to me always thought is was "round young virgins" in "Silent Night"....