Three Brothers and Celestia
There were once three brothers, who performed some great kindness for Princess Celestia. Posterity is silent on what exactly it was, but it can be assumed it was something major, because she offered the three brothers an astonishing reward. They could have anything they wanted. Anything at all.
So she asked the first brother. “What would you like?”
The first brother puffed out his chest and looked proud and stern. “I am a smart stallion,” he said, because he may have been smart, but that didn't mean he was modest, “but I wish to be even smarter. I want to be twice as smart as I am right now.”
Celestia clapped her hooves, and like that, he was twice as smart, and could calculate pi to sixteen digits. Then, she turned to the second brother.
“And what would you like?”
“I too, am a smart stallion,” he said, because pride ran in the family, “but you know what? I want to be smarter too. I want to be twice as smart as my brother.”
Celestia clapped her hooves, and like that, he was twice as smart as his brother, and could calculate pi to thirty-two digits, and list all the capital cities of the world in order of altitude. And with that, Celestia turned to the third and final brother.
“What would you like?”
“I am not a smart stallion,” he said, because pride ran into him and tripped over, “so I’d like to be smarter. I want to be twice as smart as both of my brothers combined.”
Celestia raised an eyebrow. “Are you sure? That’ll make you smarter than any stallion alive.”
“I’m prepared to take that risk.”
As he says, he’s not a smart stallion. Or, indeed, a stallion at all.
For you see, Celestia claps her hooves, and just like that, turns him into a mare.
And now, he can calculate pi to sixty-four digits.