Sequel to Cock-Fu, but pretty different in terms of content (the clue's in the title!) and could probably be read solo.

A wayward encounter with a perhaps overenthusiastic Princess Luna has left Twilight Sparkle's brain lying somewhere in the castle. The good news is she's still alive and well, if disembodied and kind of annoyed. Trouble is, no one can remember where she was last seen-it's a big castle after all. Oh well, no doubt she'll turn up. Unless she has extraordinarily bad luck and ends up getting swept off around the castle and beyond before anyone can find her. That would be most unfortunate...

Like all of my stuff this story is utter nonsense, but hopefully in an entertaining, slapstick kind of way. It's mostly played for absurd laughs but as always there is some lewd in there. Does contain hyper futas, so there's that, too!