It's being stereotypical.
For example, here in the U.S. (most) people believe that if you're from the south, you're going to have a southern drawl. This isn't true though, because I'm from the south and I do not have a Southern drawl, nor a southern accent.
and also, most people think that southerners "love" tea, sweet tea, especially.
I think tea is the most disgusting thing invented.
