Words of a second grader

Student: "I hope that they call my bus soon, I really have to go to the bathroom."

Me: "______, you can go ahead and go now, you have time."

Student: "No, these (insert shooing hand motion here) bathrooms are full of... (whisper) ...bacteria."

Me: "Oh."

Student: (doing the pee dance in place)

Me: "It looks like an emergency."

Student: "I just can't... the bacteria. I have to wait until I get home."

Me (click click goes the brain): "Do you ever use the bathrooms at school?"

Student: "Oh, no. The bacteria."