Spike, Although...

Ponies on the way downtown still waved and smiled at Spike. He almost felt like he was beginning to get used to the extra attention, and even managed to smile and wave back at a few, curling his tail into his claws and blushing adorably against the purple-green of his scales and skirt.

Rarity was most hooves-off on the way to their destination, though she couldn't hide her smiles when other ponies noticed her pretty little companion in his best dress-up attire. She would stare at Spike's behind underneath the skirt and lick her lips as he waggled his cute little tail, and only through reminding herself of the pay off the awaited at the end of the delayed gratification rainbow could she keep from reaching out to touch the butt. The butt was ever-present. It yearned to be touched.

But eventually they made it to Sugarcube Corner, which at this time of day was filled with ponies enjoying afternoon treats of ice cream and cream puffs and anything else that looked smooshy and sweet. Spike looked smooshy and sweet, and therefore Rarity concluded he was just as delicious as any of the confections on display, if not more so. And she was the one who'd seen him without a skirt. Well... so had most of Ponyville. But seeing someone in a skirt, and then taking it off them... that was another matter altogether.

Spike couldn't hide his nervousness on the way in. He noticed immediately there were a lot more ponies present than there had been at the library, and as a result began wondering instantly whether or not he could complete even the difficult task of hiding the game as a whole, whether he might just blurt out suddenly "Rarity's gonna touch my butt!" and then cover his mouth afterwards, beet-red in the wave of shame as everypony's eyes fell on him and his erstwhile mistress.

Keep it together, Spike. No one's even started touching yet.

But of course (and there was, of course, a butt), Rarity had decided to take things yet another step further. She gave Spike a quick knowing nod and wink before leaning over to whisper in his ear.

"Meet me in the bathroom. Five minutes," she said, taking care to lick lightly at the outside of Spike's ear and test his composure with the first of many little tingles and groans that would yearn to creep out of his mouth and alert the surrounding observers to the true goings on. Spike did a good job, even managing to muffle the sound of his eager whimper without needing to clamp his claw over his mouth. Rarity smiled even brighter, then took off into the crowd, leaving Spike to mingle in his pretty purple frills before the pair met up again to complete step two of the plan.

The long, plastic, well-lubricated part of the plan.

Spike made his way to the bathroom at his best estimate of five minutes, only to realize Rarity hadn't specified which one to use. Ponyville had started to incorporate a standard of three bathrooms in every public building, and Spike didn't know which gender identification Rarity expected more privacy in.

Luckily, Rarity was there to guide him forward. She peeked out the door of the mare's room and waved him in, and Spike darted forward to follow her without checking to see if anypony was watching, hoping Rarity had done the recon necessary to keep them hidden. The bathroom opened up into a set of stalls, and Rarity dragged Spike inside one near the end and locked the door behind them.

Watching Rarity take the lube and toys out of her bag, Spike was reminded of a heavy-metal poster he'd seen once in Rainbow Dash's room, of a female demon, or succubus, he thought maybe they were called, riding atop a fire-breathing dragon, wearing a crown of flames and not much else. The look in her eyes made Spike feel nervous and excited, and a little bit like he should be worried about being eaten. Ponies didn't eat dragons though... did they?

"You can choose whichever colour you like, dear," Rarity instructed as she laid out the selection of toys. All the same stout length and restrained girth, but still a feat-and-a-half for Spike's young dragon-butt in-training. Spike sized up his options, scouring for a toy that maybe had a half-an-inch here or there missing, and finally picked the blue one, for no reason other than it reminded him of Rarity's eyes.

Rarity smiled as Spike indicated his selection with a claw pointed forward. She tucked up the rest of the toys into the bag, then uncapped the bottle of lube and squirted a generous amount onto the toy. She rubbed it along the length of the artificial dong with her hooves, until it was nice and shiny. Then she turned to Spike, smiling, and gestured in a circle with her hoof.

"Turn around, dear. No need to be nervous. You've got plenty of practice by now."

Spike turned and spread his legs as requested, bracing himself with his claws on the cold metal of the bathroom stall door. He hung his head low and stared at the bathroom tile as he felt Rarity move behind him, the tangible presence of the toy as it hovered just inches away from his tight little butt-hole, which he was clenching on and off out of nervousness.

"Relax," Rarity cooed from behind him. She put a hoof on Spike's back and massaged up and down his scales, rubbing softly at the base of his tail and the top of his head, which was his favorite spot, and made him pant and whimper like a little puppy with its ear being scratched. "Just relax, and remember to breathe, Spikey. You can do it."

"I can do it," Spike repeated to himself uncertainly. His claws began to dig into the metal door as Rarity pushed the tip of the toy inside his butt. He felt himself clenching, then remembered to relax, then willed it, over and over again, repeating the word 'relax' to himself in his head, until finally, without Rarity pushing any harder at all, the tip slipped in, and then the first inch, and once that was done the rest would practically be a cake walk. Spike knew that from experience.

"You're doing wonderfully, dear," Rarity whispered with a soothing voice. She slid the toy in slowly, making sure to let Spike pant and gasp as he felt himself filling up with the lubricated plastic. Rarity pushed until the whole thing was in, only a few inches, but still plenty for the young dragon, and the translucent blue base, when it was tucked right up against his cheeks, was almost invisible to the naked eye, if you happened to be lifting up Spike's skirt and looking below his tail anyway. Which Rarity planned to be doing a lot of, in the next little while.

Spike stood up shakily, taking his claws off the door one at a time, until he was steady on his feet, and then just shifted a bit from side to side, adjusting his skirt and making uncomfortable-looking faces as he moved.

"You'll get used to it in no time, dear," Rarity said. She tucked up the bottle of lube and zipped up her bag, and threw it back over her shoulder and was ready to leave the bathroom just like that. Just like that, Spike was hiding a very special secret between the both of them, and today's challenge was to keep it too himself the entire time they were out enjoying an afternoon snack together. All he had to do was sit and eat his cream puffs.

Sitting, though...

Rarity smirked.

She'd thought about this for a while, of course. But nothing was as sweet as doing it for real.

"Shall we?" Rarity extended a hoof and unlocked the door.

Spike nodded grimly and followed her outside, walking with a slight hitch in his step all the way.