When I was a little filly, I was hauled away by the solar guards for improving the walls on one of the parks by drawing butts lined up side-by-side from one end to the other. I was sitting in my room alone after being grounded for the rest of eternity, and I had an epiphany.
I realized that I regretted nothing, and I never would; then a picture of a flaming paintbrush appeared on my ass, and that, stallions and gentlemares, is how I got my cutie mark.
I was later admitted to the Canterlot Institute of the Sub-Genius and allowed to study under the great performance artist of our time, Hugh Jelly.
All of this is 100% true facts.