Speaking of Psychology
Yuck! What disgusts us and why, with Paul Rozin, PhD
Feb 19, 2025
Paul Rozin, PhD, is a psychology professor emeritus at the University of Pennsylvania and a leading expert on disgust. He discusses the origins and evolution of disgust as a protective mechanism, highlighting cultural variations in food aversions. Rozin explains how humor can stem from disgust, showcasing the lighter side of this complex emotion. He also explores the psychological barriers related to dietary choices and the intricate relationships between disgust, morality, and societal norms.
34:40
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Quick takeaways
- Disgust is an evolved emotion that protects against harmful substances and aids in preventing disease through strong aversion responses.
- Cultural influences significantly shape disgust perceptions, creating vast differences in food preferences and impacting public health initiatives.
Deep dives
The Origin and Function of Disgust
Disgust is generally considered a basic human emotion that has evolved to protect individuals from harmful substances, particularly those carrying microbes. While the exact origins of disgust remain uncertain, its primary function appears to be to prevent the ingestion of potentially dangerous items by triggering a strong aversion response. Infants do not possess the ability to feel disgust at birth, as it typically develops between the ages of three and five, often first associated with experiences surrounding toilet training. This evolutionary adaptation serves a critical health function by steering humans away from sources of illness and disease, reinforcing its importance in both individual and societal contexts.
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