Interesting. When I resided in the Magnolia State I became quite familiar with that saying. Perhaps you'd like to spell out what it really means.
Vulgarity is the final refuge of the protestant. It coincides with their beliefs.
I am from MS. Vulgarity, my foot! I have never used “bad” language. My high school English teacher told us that showed a lack of intelligence. Neither did any of my teachers, friends or relatives. Bless your little heart. I see no point starting using that junk at age 70.