I can’t recall where I heard this, and I’ve heard it a couple different ways, but I always liked this one.
A Creative Writing teacher created a writing assignment for his students to complete over the weekend, and the tale he deemed the best would win a free pizza. He asked his students to compose a short story using the following elements for Monday: mystery, sex, religion, and royalty.
The winning entry was as follows: “My God,” said the Queen. “I’m pregnant. I wonder who did it?”
The Doc Is In 
That certainly met the criteria of SHORT story!
I might add that it would be easy to grade.