Calvin and Hobbes by Bill Watterson for May 25, 1986
Hobbes: Look, it says you have to be eighteen to buy cigarettes. Calvin: Eighteen?!? By then I'll know better! Mom, can I have a cigarette? Mom: Sure, Calvin. I think your grandfather left some here. Just smoke outside, ok? Calvin: Wow! Hobbes: Your Mom let you have a cigarette? Calvin: For a mom, sometimes she's pretty cool. EEEEEEP. Blaaugh! Gag. Hack. Cough. Ack Wheeze. Hobbes: You'd think this would be an easy habit to break. Mom: Well now..did we learn a little lesson today? Calvin: Gasp. Yes... Trusting parents can be hazardous to your health.