That seems unlikely to be true unless they were raised very religious and not in any proximity to farm animals or pets.

Not until after menopause. She was born in the rural US American south some time in the 1920s (the date is known, I just forget). She grew up during the great depression, never went to school, only knew what she learned from her mother, who lived the same way, and only socialized with other women at church, who also lived and grew up the same way. She could read and count well enough to follow a recipe and write enough to leave her husband a note, but that was about it. She was raised to believe that if she said no to her husband in the bedroom, he would divorce her, word would spread around town that she wasn't a "good woman" and she would end up an old spinster, the worst thing a woman could possibly be.

Yeah, that was only discovered in the 1990s.