I don't do social media of any kind. If I did, I may as well join Scientology.

The one thing I miss is hitchhiking. Now there's no more of that. When's the last time you saw a hitchhiker? It's not that I consider it a great sport, but it was my way of seeing the country. The open road, especially in the western United States, is still very pristine, but everything else around it has changed.

I'd read about Los Angeles and this fact stuck in my mind: that the city gained 1,000 new people every day. In 1956! A thousand people every day! I felt: 'I want to be part of that.

When I first did the book on gasoline stations, people would look at it and say, Are you kidding or what? Why are you doing this? In a sense, that's what I was after: I was after the head-scratching.

Basically everything I've done in art, I was in possession of when I was 20 years old. I use a waste retrieval method of working. I'll go back and use something that disgusted me 15 years ago but that I had enough sense to think about. Some artists change dramatically. I see my work more like history being written.

A lot of abstract painters seem to be doing everything all at once now. And so these different styles are jibing and not so jibing, and they're clashing. But they all seem to be working in their own domain. Whereas back in the '60s, man, it was kind of a dull world. It was a vital world. But it was kind of contained and not too recognized by the public. Now art is absolutely recognized by the public.

There was no hope for any kind of big opportunity. I'm not saying it was hopeless. The big pay-off was to work as an artist and gain some shred of respect from your friends, who were also artists. But there was never any notion that you could make a living out of art. On the rare occasions you had a gallery show, and sold a little work, well, that was just gravy.