Thanks to modern medical advances such as antibiotics, nasal spray, and Diet Coke, it has become routine for people in the civilized world to pass the age of 40, sometimes more than once.

Barry’s joke hinges on treating everyday consumer products as if they were life-saving medical breakthroughs. By placing “Diet Coke” alongside antibiotics and nasal spray, he satirizes modern, comfort-driven ideas of health and longevity—suggesting that what people credit for survival is often a mix of genuine science and trivial conveniences. The punch line (“pass the age of 40, sometimes more than once”) plays on the idiom “pass” as both reaching an age and moving beyond it repeatedly, implying midlife can feel like a recurring ordeal. The humor also lightly mocks “civilized world” self-congratulation about progress.