I very seldom draw in the MLP style (it’s actually quite hard to draw it and keep on-model, stylistically), but I have friends who are fans and sometimes you can’t help yourself when people are enthusiastic and silly, particularly when one of those friends has a huge weakness for cowgirl stripper costumes. It was coaxed along by a joking conversation of how, clearly, if you hide your cutie-mark, nobody knows who you are.
Added silly that the brand of the paint is “Pinto”, good horse-related-word that comes from the Spanish “pintada”, meaning painted.