Lennon in fine, bluesy, double-tracked voice again, "not a second time", nor even a third: but — unusually — he's all on his ownsome here, there's not a harmony to be heard throughout. I remember reading somewhere or other that George Harrison didn't actually play on the track, though have no way of verifying the claim (comments welcomed...)
Perhaps there was a bit of privacy protection going down in the decision to take the lead alone, on account of the way 'The Tough One's' hang-ups and doubts start filtering through into his lyrics. This is an early example: but by no means the last occasion that we'd find him wond'rin' 'why?'
Structurally, it's not a million miles away from "All I've Got To Do", with its complex twists and turns, although by no means "the same old line" — just another surprisingly mature piece of writing from the still young composer. George Martin's piano part, for example, adds quite a distinct dimension to the proceedings.
And let's not forget those 'Aeolian Cadences' at the close, as detected by The Times
' music crit, William Mann, upon With The Beatles
' release. 'A twit', according to John (who thought Aeolian Cadences were exotic birds) — but a twit who gave the band their first taste of 'respectable' credibility, nonetheless...