Ono has always been an avowed feminist. The first woman admitted to the philosophy program at Gakushuin University in Tokyo, she challenged cultural perceptions of female passivity through the music and performance art she was making long before she met her third husband, John Lennon, when he attended one of her exhibitions in 1966. He climbed a ladder leading up to a canvas suspended from the ceiling, with a spyglass hanging from it on the end of a chain. Through the glass he read the word “YES” printed in tiny letters. In a counterculture context in which the avant garde were against everything, her positivity appealed to his quirky sense of humour — and they fell in love.