Doonesbury by Garry Trudeau for October 31, 1975
Transcript:
B.D.: Zonker, who the hell was sleeping in my bed last night?! Zonker: Oh, gee, sorry, man, I thought you were in Boston... B.D.: I came back early! I got in around one and I find this guy... Zonker: It's my dad, B.D. He's... Boopsie: Hey, you guys! B.D.: Well, you could have told me, you know! Zonker: Well, I... Boopsie: Listen, there's some old guy in our kitchen drinking Maalox! Mark: Hey, who keeps putting "My Fair Lady" on the stereo?! Zonker: Everybody relax!