Yes, it says that Desmond, rather than Molly, stays at home and does “her” pretty face! Was this an ahead-of-its-time inclusion of a transgender character? Was Molly really accepting of her husband’s proclivity for performing in drag?

Actually, the explanation is much more mundane: a simple error by McCartney. The line was supposed to be “Molly stays at home and does her pretty face…” but McCartney liked the nonsensical nature of how the mistake came out and so decided to keep it.

The song “Get Back", on the other hand, does include a transgender character in the form of Loretta Martin.

McCartney “borrowed” this phrase from a Nigerian acquaintance of his, Jimmy Scott-Emuakpor, who would eventualy play with Bad Manners and allegedly also played bongos with The Beatles on an unreleased version of “Ob-La-Di Ob-La-Da”. Jimmy later attempted to sue McCartney for stealing his catchphrase without permission, but the case was dropped when McCartney paid his legal fees for an unrelated issue.

He got annoyed when I did a song of it because he wanted a cut,“ Paul told Playboy in 1984. "I said ‘Come on, Jimmy. It’s just an expression. If you’d written the song, you could have had the cut.’

There is a widespread rumour that “Ob la di ob la da” is a Yoruban phrase meaning “life goes on”, however, it is not proper Yoruba. Singer and artist Shinri, who claims to be Jimmy Scott’s nephew and even wrote a song about McCartney and his uncle’s debate says the family is Urhobo, not Yoruba, and in any case the expression is not in any standard language, because it is more of a family joke.