I just saw a presentation by the author of a book reflecting on time spent with the Beatles. Before the author took the stage, there was a little bit of a sing-along, where the following lyrics were presented:
You know i work all day to get you money to buy you things
And it's worth it just to hear you say you're going to give me everything
So why on earth should i moan, 'cause when i get you alone
You know i feel ok
Hm, says I. That's doesn't sound right to me. "So why on earth should I moan"?
I just now checked, and indeed there are online lyrics lists that have those as the words, but my two Beatles songbooks (neither one authoritative, but better than the Internet) both give it as "So why I love to come home", which is how I've been hearing that line all along. I'll concede that my preferred version makes a little less literal sense, but the Beatles didn't always champion lexical orthodoxy.