yes i can remember various things that just seemed to be received wisdom when i was young, so not peculiar to my family.
eg hair washing was a hazardous undertaking, and it was unthinkable to go out after doing it. usually done on a friday evening, but not too late, as needed hours to be sure was dry, before lying down.
i think many of these were rooted in survival in cold houses. no one had central heating. and a chill could easily turn into something worse.
my parents never ate or gave us bread and dripping, but it was generally held to be essential to line the stomach !, to grow up strong, get curly hair etc.