Probably the second story about ponies I ever wrote, in which Rarity is under some duress due to a bit of a problem she's been having; producing milk. Unable to free herself from her ailment, she has to put her pride aside and ask for Spike's help. Second half details the appointment Spike is late for with Twilight, a treatise on Pony-Dragon congress that's been driving Twilight up a wall. Attempt at human near the end with Celestia.

It's not by best work, but if you like lactation and psycho-Twilight, this might tickle your fancy.