Sociology
The Sociology of Disgust and the Maintenance of Social Boundaries
Quick fact
Sociologist Norbert Elias showed that early modern European etiquette manuals forbade eating with hands and spitting at the table, not just for hygiene, but to distinguish the 'civilized' from the 'barbaric', turning bodily habits into markers of social class.
Why this is interesting
You probably think of disgust as a purely private, visceral reaction—but what if it's also a social weapon?