The Creation of the Unicorn

Since I was on the topic of Noah and his arc, I wanted to talk about the unicorn. The Irish Rovers sing about the unicorn but where did it really come from? Here is my theory:
There was a boy in school who had to wear the dunce cap every day because he was slow. The other kids mocked him and every day without fail he had to wear the dunce cap.
One morning before school, he did a drawing of horses. On one horse, he drew a dunce cap on his head. "There, someone else has to wear it for a change," he said. Suddenly the sky opened up into a beautiful blue and the birds came out singing. The sun radiated a beautiful warmth worthy of a summer day. Even the ice cream truck made a surprise appearance. "Wow, what a beautiful January day", he said as he trotted off happily to face another day of humiliation and the ceremonial wearing of the dunce cap...