Doonesbury by Garry Trudeau for January 23, 1975
Transcript:
Woman: Norman, stop sulking and wave good-bye to your sister! You're never going to see her again, poor lamb! Boy: But, ma, it's just not fair! How come Suzy gets to be a volcano virgin and I don't? Woman: Boys aren't allowed to be volcano virgins, Norman! You know that! Boy: But why not?! I could do it, I could qualify! Easy! Woman: Norman, will you stop making such a fuss and wave goodbye to your sister?! She's at the rim already! Boy: I can be just as chaste as any dumb girl!! Woman: Last chance, Norman - she's getting into her crouch!