In the very early 1980's, Dr. J. was featured in a commercial for Chapstick ... the gist of the commercial was that all of these kids were waiting around an airport to get Dr. J.'s autograph. They were confused when he signed his autograph "Dr. Chapstick." He explained that he loved Chapstick so much, that he was changing his name to "Dr. Chapstick."
I remember going to school confused at this, because I really did think he changed his name ... Thank goodness, he wasn't promoting 2000 Flushes!