As a child, John Lennon remembered his mother singing a song to him from the Walt Disney film, "Snow White and the Seven Dwarfs." The song was "I'm Wishing" and it begins with those words: "Do you want to know a secret, do you promise not to tell?"
Years later, he used those words in the Beatles hit song" Do You Want To Know A Secret". Songwriters! I never tire of thinking of how they get their ideas! (I don't know what made me think of this today. I might have told you this before but I still find it interesting.)