A very short story

“Mrs. Martin, I have to tell you about something bad.”
“OK, James. What is it?”
“When we were in the computer lab practicing our typing, Alex wrote ‘D-head’.”
“D-head? What’s D-head?”
“You know, Mrs. Martin. A bad word. That starts with D. And has ‘head’ on the end.”
“Dumb head?”
…