Rarity is the most beautiful mare in all of ponyivlle, the most feminine Element of Harmony and the sweetest, most wonderful being, Spike has ever laid eyes on.
But she has a secret. A secret that she has to share with him tonight.
What if Spike finds out soemthing he would have never expected?

Rarity (male) and Spike (male) one-shot scene, based on a forum dialogue, I had a short while ago.