Doonesbury by Garry Trudeau for September 03, 1973
Transcript:
Alice: What? You're quitting? Zonker: Gotta, Alice. I've got football practice comin' up. Alice: Football practice?! Honey, I never figured you for a jock! Zonker: Oh, sure! Every day I run five miles, slam my body into tackling dummies, and I catch passes until my hands are raw! Alice: Do you develop more than a one beer thirst? Zonker: Absolutely!
More likely more than a one bong thirst but no sense telling that to Alice.