Re hair, there's Al Stewart's darkly brilliant "Pretty Golden Hair" which seems to be the central character's undoing (there was a clip of him singing it on the Beeb's Folk Britannia).

Also there's George Carlin's hilarious poem/monologue (which could be set to music) which is called something like "Be Fair To Your Hair" and has every rhyme in existence, including French ones ("Au contraire, mon frere"...)