I attended college 2 hours from home - both in Georgia. After I had been away for just a few weeks, I was talking to my dad on the phone and he wanted to know if "I had been hanging around a bunch of Yankees"! Guess he never realized that I didn't have a "strong" Southern accent like he thought I had living at home!
Years later when I was working in California, a co-worker started kidding me by saying "y'all"...then he couldn't stop, lol!!