Von Bontee said
It's not as though they titled one "Cranberry Fields Forever" or something.
That made me laugh out loud. 
And it reminds me of one of my original thoughts when I started this thread: I was listening to an obscure (to me, anyway) Bruce Springsteen song, and I realized that he gave it the title "Tomorrow Never Knows." Hmm, okay, that's no big deal. Then I wondered to myself, "Which Beatles song titles are absolutely untouchable by other artists?" Obviously, no one will dare release another "Strawberry Fields Forever," or ...