On Walrus it is: "Everybody's got one". Its in several Lennon interviews.
Unintended lyrics
Music to sooth the savage beast (breast).What songs do you know that people routinely misunderstand the lyrics, to the concernation or amusement of the artist. For example Dylans's "Excuse me while I turn and kiss the guy" (kiss the sky). Nylons "Give me the Beach Boys and free my soul" (Give me the beat boys and free my soul I want to get lost in the rock and roll)