more obscure. According to McCartney, the idea of a coloured submarine originated from his 1963 holiday in Greece, where he had enjoyed an iced spoon sweet that was yellow or red, depending on the flavour, and known locally as a submarine. Lennon had also thought of an underwater craft when he and Harrison and their wives first took the hallucinogenic drug LSD in early 1965. After the disorienting experience of visiting a London nightclub, they returned to Harrison's Surrey home, Kinfauns, where Lennon perceived the bungalow design as a submarine with him as the captain. Musicologists Russell Reising and Jim LeBlanc comment that the band's adoption of a coloured submarine as their vessel chimed with Cary Grant captaining a pink one in the 1959 comedy film Operation Petticoat, made during the height of his psychoanalytical experimentation with LSD. The Beatles' and psychedelia's adoption of childhood themes was also evident in the band's May 1966 single "Paperback Writer", as the falsetto backing vocals chant the title of the French nursery rhyme "Frère Jacques". Starr later said he found "Yellow Submarine" a "really interesting" choice for his vocal spot, since his own songwriting at that point amounted to "rewriting Jerry Lee Lewis's songs". In author Jonathan Gould's opinion, Starr's "guileless" persona ensured the song was presented with the same "deadpan quality" that he gave to the Beatles' feature films. As a result, Gould continues, the eponymous submarine "became a satirically updated version of the improbable craft in which Edward Lear put his characters to sea – the Owl and the Pussycat's pea-green boat, the Jumblies' unsinkable sieve". The song begins with the first verse, opening with the line "In the town where I was born". The structure comprises two verses and a chorus; a third verse, followed by a chorus; two further verses, the first of which is an instrumental passage; and repeated choruses. In musicologist Alan Pollack's description, the melody is "painfully simple, though in a subtle way, bears the John Lennon stamp of pentatonicism". The composition uses just five chords; in Roman numeral analysis, these are I, ii, IV, V and vi. The lyrics offer an anti-materialist message typical of the Beatles' songs on Revolver and of psychedelic culture. Reising and LeBlanc view the song's lyrics as a celebration of "the simple pleasures of brotherhood, exotic adventure, and an appreciation of nature". They also see "Yellow Submarine" as the band