"A Hard Day's Night"

A couple days ago, the Beatles' various social media accounts posted about Paul's singing the bridge of "A Hard Day's Night" because John couldn't reach those higher notes.

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“The only reason Paul sang on ‘A Hard Day’s Night’ was because I couldn’t reach the notes - ‘When I’m home, everything seems to be right. When I’m home…’ - which is what we’d do sometimes: one of us couldn’t reach a note but he wanted a different sound, so he’d get the other to do the harmony.” - John ➿ #TheBeatles #1960s ➿ Photo © Apple Corps Ltd.

A post shared by The Beatles (@thebeatles) on May 24, 2019 at 7:06am PDT

Just by reading the lyrics there ("When I'm home, ev'rything seems to be right..."), I realized a small feature:  the three syllables of "ev'rything" are sung to different notes (G F# E), musically giving something of a sense of breadth.