 It's my defense mechanism. Some defense. If I was the killer, I would kill you next. But his first brush with showbiz was as a songwriter. A year after A Boy Named Sue was a big hit for Johnny Cash, he wrote a response called A Girl Named Johnny Cash. Who knew? Martin Mull was 80. This is CBS News. Sponsored by Progressive Insurance. We offer auto, home, and commercial auto insurance, plus a variety of business insurance options. Visit progressive.com.