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

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