My five-year-old daughter: "If they don't have a beard, they're not a real dad."
But, by dad, she meant man. She refers to all adult men as dads, and all adult women as moms.
So, my five-year-old, through no instruction on our part, has concluded that without facial hair, you can't be a real man.
By the way, we did, of course, correct her misunderstanding.