Why Double-Dipping Feels So WrongThe science behind a major party foul.

From the show

Hidden Codes of Conduct

Breaking the 'no double-dipping' rule can trigger a visceral reaction. This social taboo, famously highlighted on 'Seinfeld', isn't just about politeness; it's a powerful instinct at play. Our brains are hardwired with a 'behavioral immune system' to protect us from contamination. Scientific studies show that taking a second bite does transfer bacteria, validating our intuitive sense of disgust and explaining why the act feels so repulsive.