Upper castes, likely Brahmins and Kshatriya rulers, imposed practices like wearing pots around necks and brooms around waists on untouchables, not Shudras, per historical evidence (e.g., Maratha rule). Siddhu’s query may stem from "Shudra: The Rising," a film depicting Manu Rishi enforcing such rules on Shudras, causing confusion with untouchables.