You wouldn't think that the guy on the left there is one of the country's foremost parodists, responsible for creating a wonderful body of work of musical parody, and helping to set the tone for cynical political humor. Well he is. That's Tom Lehrer. The picture comes from
here -- a fine tale told by the gent on the right, who was Mr. Lehrer's final student.
After Mr. Lehrer placed himself in musical history, he went back to teaching college-level math. He was always cryptic about the works that he'd created. He was happier just teaching math, it seems, and so that's what he went back to. Now, many decades later, he has retired.