Doonesbury by Garry Trudeau for December 15, 1970
Dean: Oh, Mike...I've been looking for you, boy. Mike: What can I do for you, Dean? Dean: Mike, I wonder if you could speak to this new girl. The other guys can't seem to get through to her...Ah, here she is now. Mike, this is Melissa Pepper. Melissa, meet Michael Doonesbury. Mike: Hi. Melissa: Oink. Dean: Well, good luck, champ... Melissa: Oink, oink. Woof woof! Bow-wow!