Welp. Here's how i picture it. They all buy normal clothes, right? right. When they are young'ns, all of a sudden, on every article of clothing they own, their cutie marks appear. And that's how bananas are made.
OhmyGoshOhmyGoshOhmyGoshOhmyGosh/)^3^(\ This is sooooo awesome. And it also made me think. Would you be able to somehow draw the scene where applebloom asks what 'uncouth' means. Applejack explains it for her. Bloom burps and Jack goes 'EXACTLY!'?