Robin was an outgrowth of a conversation I had with Bob. As I said, Batman was a combination of Fairbanks and Sherlock Holmes. Holmes had his Watson. The thing that bothered me was that Batman didn't have anyone to talk to, and it got a little tiresome always having him thinking. I found that as I went along Batman needed a Watson to talk to. That's how Robin came to be. Bob called me over and said he was going to put a boy in the strip to identify with Batman. I thought it was a great idea

Jim Steranko (1970). The Steranko History of Comics. Reading, Pa.: Supergraphics. pp. p.44. ISBN 0-517-50188-0.