Sick And Tired

Am I the only person anymore who takes pride in the way in which I speak? Subject verb agreement seems to be virtually nonexistent. Has America forgotten simple Language Arts? I was at a local shopping establishment yesterday picking up some last minute items for an upcoming trip. The destination, South Beach, but I should not digress. I was paying for some suspenders, and a calfskin belt at the register. As I reached into the inside of my topcoat to retrieve my American Express, I heard something that will forever change me. It came like a freight train straight to my ears, my face got red, and I instantly began to perspire. I heard the voice of a woman, most likely in her late 30's, say, "He don't like his shirts all stiff." My defense mechanisms went into full swing, and after dropping my AMex on the counter, I turned with utter disgust and scowled at the woman. I was speechless, part of me wanted to exit as fast as humanly possible as to not breathe the same air as this woman, but another part of me was compelled to teach a crash course in 2nd grade Language Arts. Nonetheless, I paid for my goods and swiftly exited. My disgust began to swell, and cause me extreme discomfort. What makes this woman think that it is acceptable to blurt out phrases that do not make sense. Doesn't is a contraction of does not and should be used only with a singular subject. Don't is a contraction of do not and should be used only with a plural subject. The exception to this rule appears in the case of the first person and second person pronouns I and you. With these pronouns, the contraction don't should be used. Not only was her sentence structure incorrect, but whoever she was buying shirts for is dead wrong as well. He must be a liberal Democrat that probably likes his shirts flimsy. As you all know I am a starch Republican, and prefer shirts with some "heft" and a heavy thread count. What say you?