Rainbow Dash finds Scoots in her home tweaking on "The Dash", after Scootaloo comes off her high Rainbow Dash explains some rather interesting secrets about pegasus culture. As well about the many magical, pharmaceutical, combative, and weather related uses of pegasi pee, and the horrible truth about the magic contrails from pegasi flying and the Sonic Rainboom.
This story was inspired by a random, sleep depriving, sanity breakingly inspirational conversation with Rainbow87Dash on the fic Dashaloo Days: Wonderbolt Flight Training. Good fic, this here is the random insanity that was born from that conversation.