"Did you wash your hair?" I asked.
"Yes." She went on to explain to me why it was dirty. "From being outside."
Then she continued, in a matter-of-fact tone.
"So I needed to wash it in the potty."
My parental poker face failed me. I'm hoping my uncontrollable giggles didn't too badly compromise my message as I assured her that washing her hair in the potty is not a good idea.