They think you're stupid
No one can decide who you are and what you should do and who you can be. Only you can.
It's called the vulva
If you ask your child, especially your daughter, "What is the vulva and where is it?"
From what I've noticed, not many girls know.
But, if you asked your child, girl or boy, "What is the penis and where is it?"
Most kids know that answer.