From a New York Times obit by Richard Sandomir headlined “Sean Kelly, Early National Lampoon Troublemaker, Dies at 81”:

Sean Kelly, a wry master of literary and musical parodies who helped infuse National Lampoon with the sharp-edged and often crude humor it became known for, died on July 11 in Manhattan.

Mr. Kelly began writing for the Lampoon soon after it started in 1970, as it was developing a reputation for unrestrained irreverence toward politics, sex and popular culture, advancing humor for baby boomers beyond the boundaries set by Mad magazine. He later became an editor and, in 1975, was named editor in chief.