she couldn't rock n' roll with me and I couldn't avant-garde with her

"... Then, I met Yoko. And she was making it as an avant-garde artist. And we both tried to find something that we had in common, a goal in life. Because she couldn't rock n' roll with me and I couldn't avant-garde with her. I mean, we can, but that's what we thought at that time. So we decided: the thing we had in common was Love. And from Love came Peace. So we decided to work for world peace."

John Lennon, from an interview made to John & Yoko