LOS ANGELES (AP) — It’s common knowledge around Beatles fans that Paul McCartney wrote “Hey Jude” about John Lennon’s son, Julian. What they may not know is that it’s not entirely about Julian. McCartney tells Billboard magazine, “The only thing about Julian in the song is the first lines.” John Lennon thought the song was about him and Yoko Ono. Is it? McCartney won’t say what the rest of the song is about.