She was playing a multi-player computer game and some idiot called her a pussy for hiding from the monster. She asked what that word meant.
I told her that it's a word that's slang for vagina. I explained that in the context it was being used, the person meant it as an insult. A coward. A scardy cat. And, like as if being a girl made her lesser.
I said, "I'm going to tell you a secret that no other kid you know will know." Her eyes got big as saucers and she was practically jumping out of her seat. "Vaginas are amazing. They have to stretch to this big to push out a baby. Women get their periods every month. And cramps hurt. Men don't know what pain is. So many men get a cold and act like they're dying. So the next time someone calls you a pussy, brush it off and say to yourself, 'Hey thanks!' Because vaginas, and the women they are attached to, are amazing, strong, and resilient."
Then we watched videos on YouTube of men trying period pain simulators and laughed.
The End.