Doonesbury by Garry Trudeau for April 12, 1973
Bernie: Hey, Mike, before I go, I want you to tell me what you think of my new serum. Mike: Later, Bernie, I gotta run through these tests. Bernie: Aw, c'mon, it'll only take a second. Just give me a quick reaction and I'll be off! Mike: O.K., O.K., let's see... Bernie: Well? Mike: I love it. Bernie: Hee hee! See ya tomorrow. Mike: Right.