Celestia's Precious

Celestia walked into Canterlot Tower. She had had a stressful day, and it was time to blow off some steam.
She entered the long hallway, with the stained glass windows depicting various events. The Elements of Harmony, Discord. She saw it. At the end of the hallway, her favorite thing in the world. Even better than Luna.
The Door.
Just the sight of it got her flustered. It was the most beautiful door in existence. Purple, lavender, and pink, with an eight-pointed star in the middle. She quickened her pace. When she finally reached the Door, the heat in her loins was almost unbearable. She lovingly nuzzled the door, then licked it. Rubbing her hoof against it sensually, she whispered sweet things into its lock. Her wings spread of their own accord, stiffening in response to her arousal. Finally, she couldn't take it anymore. She inserted her horn into the Door's hole... then pulled it back out, and then shoved it back in again. She did this several times, then a burst of magic popped from her horn. Lines of blue covered the door, and it opened, and Celestia collapsed to the floor, sweating profusely, face covered in bliss.