First cowboy: "I'm from Texas. Call me 'Tex.'"
Second cowboy: "I'm from Louisiana. Call me 'Louise.'"
In case you don't get the joke: drag mouse
from here
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"Tex" really is a common men's nickname, for people from the state of Texas.
The pronunciation of the first two syllables of the state name "Louisiana" sounds exactly like the woman's name, "Louise.".
^^^^^^^^^^^^
to here.