This thread is inspired by @Applebyapples - hope that’s OK! When you posted that your grandmother is horrified by pegs left on a washing line and calls it slovenly, it recalled mind a couple of bits of ‘family lore’ from my own elders and thought it might be interesting to see if there was any resonance with others here.
Nana J: Females shouldn’t drink pints, it’s unladylike.
Nana B: Central heating is unnatural. As is having a bath more than once a week.
Both ladies are deceased and have been for some time, but I remember growing up with these weird sentences bumping about in my brain. Do you have any weird lore? Guess it’s kind of ‘old wives tales’ territory?