After reading a book by Spitfire's personal trainer, Rainbow Dash decides that the best way to get closer to her ultimate goal of joining the Wonderbolts is to add strength training to her practices by having one of her friends ride her. However, when she decides that Twilight Sparkle is just the mare for the job, the pegasus gets a bit more than she bargained for.

Artwork by Piggybank12. Used with permission. Thanks to DPV111 for assisting me with story planning.

In an effort to keep her mind occupied, Twilight Sparkle decides to delve once again into the grand mysteries of Pinkie Pie. This time, Twilight's focus is on her claims of growing up on a rock farm: like so many things related to Pinkie Pie, the idea that somepony could grow rocks as an agricultural product makes absolutely no sense. However, the investigation eventually leads Twilight to a rather... surprising discovery.

This is the first story in The Petriculture Cycle.

Artwork by Page Turner. Now with a TV Tropes page.

What happens when you discover that your most private of sanctuaries is no longer there? Two beings, one man and one pony, learn just that when they find that their bathrooms are no longer their own. How do these beings handle this strange occurrence and will they let it get in their way?

Since This isn't my bathroom! did so well and I was told by many to do more, I have transformed this into a short series where one poor man will be subjected to more room swaps than should ever happen. Yes, the first addition to the bathroom is the kitchen..