According to the food preparation hypothesis, sex differences in disgust sensitivity may stem from different sex roles that males and females played in our ancestral times. In current times, these differences may be reflected in varying levels of disgust sensitivity between people who frequently versus rarely engage in meal preparation, or who are versus are not professionally responsible for providing meals for others. To test this reasoning, we conducted a preregistered study with 493 individuals (55% female), with 280 of them working in the restaurant industry. Participants reported their weekly time spent on cooking-related activities and completed the Food Disgust Scale and pathogen subscale of Three Domain Disgust Scale. These measures capture specific, food-related disgust sensitivity, and generalised pathogen disgust sensitivity, respectively. We found that while time spent on cooking was not associated with disgust sensitivity, people professionally engaged in food preparation displayed higher levels of food-related disgust sensitivity. There was no effect of cooking on the generalised pathogen disgust sensitivity. Additionally, we observed sex differences in both types of disgust sensitivity and found that vegetarians exhibited lower disgust sensitivity than meat-eaters. Overall, our findings offer preliminary support for the food preparation hypothesis, and point out that the mechanisms adjusting our disgust sensitivity levels are category-specific, even within the broader pathogen disgust domain.
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