Doonesbury by Garry Trudeau for March 10, 1987
Trippy: Sal? Sal: The name's Dr. Whoopee, now, Trippy. Im' your safe sex rep! Trippy: Safe sex? Sal: The finest in Whoopee cushions, delivered to your door! Trippy: You can phone in an order any time, or, like most people, you can subscribe, and a six-pack will be dropped off every morning! Trippy: Um...is that what the other guys are getting? Sal: At a minimum. Just sign here, chief.