When you're working with an object, you can put in almost anything you want, you can make it abstract.

The end of the '60s was a terrible time. I was in Los Angeles then, and I remember the night someone ran into the studio and told us about the Manson murders. Then suddenly something happened, the '60s disappeared. The '70s were completely different.

The right angle is one of the world's basic shapes.

The art world was very small and the people got together at parties. There was less commercialism.

You can take an object and simply put anything you want in that object, and I accessed that partly through Freudian ideas.

Andy [Warhol] was on the scene, but he wasn't an artist at first; he was more an illustrator. He was always surrounded by about ten people who worshipped him. He'd go to a party and they would all come along. But he was drawing shoes and that sort of thing.

Duchamp is known for calling a thing art, rather than making it. A lot of that is picked up in pop art, too.