South Korean culture places heavy emphasis on strict hierarchical etiquette, Confucian values, and interpersonal respect, meaning several common behaviors can be perceived as deeply offensive. Disrespectful actions include handing or receiving objects, money, or business cards with only one hand instead of two; speaking loudly on mobile phones on public transit; wearing shoes inside residential homes or traditional dining areas; initiating meals before elders take their first bite; and failing to bow or use appropriate honorifics when addressing senior individuals or superiors.