Doonesbury by Garry Trudeau for March 02, 1979
Duke: I'll be packed in a minute, Springfield. Just make yourself comfortable. Man: Quite a place you have here, Mr. Duke... Duke: Thanks. I built this cabin myself, back in 1963. Did the decorating and everything. Man: Very nice. May I ask why you keep land mines on all the sofas? Duke: Yeah, I was trying to teach the dogs to stay off the furniture. Man: What dogs?