Eddie Murphy once did a stand-up piece where he talked about an unexpected phone call he received from Bill Cosby. The older, more famous comedian told Murphy to clean up his act.
The two had never met, but Cosby thought Murphy cursed too much. He advised him to stop using the F-word in his routine. He also told Murphy to stop being so graphic with sexual innuendo and language. Children were watching and repeating the jokes, the senior comic said.