"He's the one who likes all our pretty songs and he likes to sing along and he likes to shoot his guns but he knows not what it means Don't know what it means." - Nirvana "In bloom" That lyric comes from a song which sounds cheery and as dictated was sung along loudly when the band played it live, the majority of audience completely overlooking the irony of it all. I guess it goes back to children's songs like "Rings around the Rosie" which is about the black plague and has been sung cheerfully by children who have no concept of the topic they're singing about. And it has been something which has been used over and over in popular music, a song that sounds really happy and everybody sings it along, not really realizing what that song is actually saying. Buck Owens "Act Naturally" is a good example, the subject of the song is somebody who isn't really worth all that much in daily life and is cast for a movie where he basically has to be himself: a miserable piece of crap.