I had a couple people tell me the most spastic thing I think I've ever heard:
"You need to keep your daughter's hair cut short so she'll have thick hair."
Um yeah....that's all predetermined people. Haircuts don't do anything to your hair, it won't grow faster, turn color or get thicker. *If you have really raggedy ends it might look thicker, but it's not any thicker.
I got a lot of "Give her a bottle or else if you die she'll starve" "Give her a bottle or else you'll never be able to leave her with anyone" Etc etc. Neither of my kids ever had bottles, and I had no need to train them to a bottle so...
Blowing smoke in their ears if they hurt....that's a big old wives tale. It's the warm air not the smoke that feels so good.
Not enforcing handwashing as a way to build immunity. I get this, but after using the bathroom? Come on...
And the good ol' "You shouldn't let her sleep in your bed you'll never get her out." My oldest left the bed voluntarily around 4-5. Of course we still slept in the same room and this is my quietest best behaved child.
"If you don't set her down she'll never learn to walk." This was in reference to my oldest who actually did walk late lol, and I did hold her all the time, and she never even cried, I just held her because it felt right.