What cultural faux pas should I try to avoid making in South Carolina?

We asked people in South Carolina if they could share any humorous cultural blunders they commited. For new expats, keep in mind that these incidents are an inevitable part of expat life. Learning to laugh about them is the key!...

Other Questions:

•  What do I need to know before moving to South Carolina?
•  How do I find a place to live in South Carolina?
•  What is a typical expat home or apartment like in South Carolina?
•  What is the average cost of housing in South Carolina?
•  Should I buy or rent a home in South Carolina?
•  What should I pack when moving to South Carolina?
•  What cultural faux pas should I try to avoid making in South Carolina?
•  Why do people move to South Carolina?
•  What are healthcare services like in South Carolina?
•  What are medical services in South Carolina like?
•  What are typical rents in South Carolina?
•  What appliances are typically included in a rental?