When it comes to biology, Applejack likes things the way apple trees pollinate: nice and simple and straightforward. But still, somepony's gotta explain the facts of life to a growing Apple Bloom, and when Fluttershy comes by, so lovesick about Big Macintosh she can hardly stand it, well, that's what friends're for, ain't it?
Till Fluttershy reveals something else, and then, well, then nothing for AJ will ever be simple again.
The first of my "Asexual Applejack/Futanari Fluttershy" trilogy, this was inspired by Kits's shipping contest since Twilight's List was the first story that made me understand how shipping would work in the Ponyverse. I've since continued my studies with The Games We Play, Romance Reports, and Trixie's Magic Bit, so this one definitely gets the "Mature" rating. It also gets a sequel: "History: A Romance Continued."
Mike
Asexual Applejack discovers Futanari Fluttershy.
After "Biology: A Romance" comes the further mature-rated adventures of asexual Applejack and futanari Fluttershy.
Despite Discord coming to Ponyville and Twilight becoming a princess, Applejack and Fluttershy are still determined to get married and start a family in this third "asexual Applejack discovers futanari Fluttershy" story.