Onomatopoeia

It is in the words of eleven songs, from 1963 to 1969, almost the whole of the writing. It sits thickest on the Please Please Me album, two of its fourteen tracks. Both ends are McCartney's, 'I Saw Her Standing There' first and 'Maxwell's Silver Hammer' last. 'Boys' ('Bop shuop, m'bop bop shuop') and 'Roll Over Beethoven' use it too. It drops out of their writing and comes back more than once, with no song from 1964 or 1966. The lead vocals go Paul on four, John on two, Ringo on two and George on one. McCartney wrote six of the eleven, among them 'Lovely Rita' and 'Ob-La-Di, Ob-La-Da', 7% of his songs against 3% of Lennon's. On 'Drive My Car': 'Beep-beep'm-beep-beep'. On 'All Together Now': 'Bom bom bom bompa bom'. Of the eleven, 'Lovely Rita' has non-traditional percussion on it, one of only two of their recordings that do.