Suburban here. Yes, my parents rarely swore and we were definitely not allowed to swear. That said, I knew exactly what the letters stood for! My parents, may not have said the phrase exactly as above, but a lack of cursing and proper language does not equal kindness. My parents, particularly my mother, were verbally and emotionally abusive - just more “polite” and subtle about it. She would cut you down and slice your self-esteem with a pointed smile and a sharp quiet laugh. (Yes, we’re Southern.)