"You'll Be Mine" is a short song, composed by Lennon–McCartney in the Beatles' early years, then known as the Quarrymen.
[1] It consists of Paul McCartney singing in a deep baritone, offset with shrill falsetto backing vocals by John Lennon, and guitar strumming.
The lead vocal sings, in rather confused lyrics, about his determination of making a woman his; while the falsettos wail the last word of each sentence.
About halfway through the song, Lennon gives a mock-bass voice spoken interlude about how, when the woman brought him toast one morning, he looked into her eyes and saw a "national health eyeball", then proceeded to love her like he has never done before.
To add to the confusion, the song is very difficult to understand; clicks, buzzes, fuzz, giggling, and the baritone voice obscure the lyrics.