it's my life

I was a first grade teacher. I had a small number of children gathered around a table for a reading group. After the story was read I gave the children a work sheet to do. I thought they may have some problems so I wanted them to work on it there.
I heard Little Johnny say very softly "Jesus Christ!".
I leaned over and said quietly, "We don't say that in school."
He looked at me, his eyes got very big and he said, "Not even when things are all fucked up?!"