Took my oldest daughter, 18 year old, to see Paul a few years back and she asked if this was a famous song. Uhhh, yeah!
BTW, he wrote it for John’s son, Julian, to comfort him during his parent’s divorce. Saint Paul!
https://twitter.com/rockwalklondon/status/1033599562886406144?s=21

18 and never heard “Hey, Jude”. You gave her a sheltered life. 🙂
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It’s called Facebook!