"Lozione D'amore? So this is what Twilight was raving about the other day." Spike held the small bottle before him, looking at the plain container for any clues to its many secrets. He popped the top, sniffing the concoction and leaning back as a putrid odor hit his nostrils. "Eugh! This junk smells awful!" Spike capped the bottle, placing it into a small knapsack that Rarity fashioned for him. He turned about, and made for the front door. "If even half of what I heard Twi' and Dash bragging about is true, then this could be my key to winning Rarity's heart!" Spike vacated the library, making direction for the Carousel Boutique.

As he scurried out, he nearly ran into Twilight, skidding to a stop before her, his knapsack swaying from the force of running. Spike looked up at Twilight, her face showing intrigue. "Well, where are you going, oh Faithful Assistant?" Twilight leaned down and smirked. "Off to a certain designer's aid?" Spike nodded hastily, his eyes showing a tinge of fear. "Well, have fun. Here," she levitated a few bits his way, "take these just in case. I expect you home for dinner, mister!" Spike nodded, snatching up the bits and turning tail, rushing off to his fateful destination. "And have fun!" Twilight yelled after him, shaking her head. She turned about, making for the front door of the Library.

As Twilight entered her room, she flopped down on her bed, rewarding her with the squeaks of the mattress and the crumpling of cardboard. "Wait, the only cardboard under there is—" Twilight shot upright, her head poking under her bed, and horn illuminating the area. A worn cardboard box came into view, its top flaps left half-closed, the caps of several lotion bottles shining in her magic. She eased the box out, little by little, until the whole stock emerged from under the bed. She opened the flaps, noting the careless arrangement of the flaps, and the lack, thereof, of proactive thought. Her conscious poked her in the side, her brain struggling to keep up with the questions soaring into it. She glanced down, seeing a bottle missing, and looked out the window toward the Carousel Boutique. Twilight hung her head. Rarity had brought about this mess, and she was about to experience its first backfire. She snickered. It was all she could do to not set up her telescope and put some popcorn on the stove.

Spike approached the Boutique, eyes gleaming in anticipation. He toyed idly with the bottle, moving it between his hands as he stared at the building, flashes of white and purple floating by the windows every so often. He set his gaze in determination and opened the bottle. He looked at the material inside and promptly smeared half the bottle on his hands. Spike began to rub the lotion in, squeezing out the rest of the bottle as he began to grow tingly. His whole body prickled as though on ice, his limbs locking up as he sprouted a look of confusion. "What's going o—" Spike's voice cut out as he found it harder to take a breath. His insides churned, the changes beginning in earnest. He doubled over in pain, clenching his chest, as he crawled slowly toward the Boutique with what strength he had. 'Must...reach...Rarity...'

Reaching out with a claw, he watched, frozen from the change as his arm began to shrink back into his torso. It retracted completely, leaving a shiny surface behind, which began to spread across his body. He began to shrink, growing rounder and rounder, as though shaping into an egg. His features echoed pure bliss and hints of confusion as his mind eased into the transformation, his legs retracting and leaving him helpless, laying atop Rarity's doormat. As he shrank, he felt his head begin to lean away from his body, falling away with a small pop, his eyes shooting wide open, before growing dull and changing to rubber, becoming a pair of buttons, as though on a simplified remote. His neck elongated, becoming wiry and connecting his remote-head with his rounded body. His scales shrank and shifted about his rounding body, creating four even rows of ridges all across the egg-shape he was becoming. As his features disappeared, becoming hard plastic and latex, he drifted off into a dreamless sleep of ecstasy.

A deep purple vibrator sat atop Rarity's doormat, the remote sitting a few inches away, trailing a line to the vibrator. Its greenish ridges lined the outside, promising a world of pleasure for the user, and its speed settings could more than satisfy a mare. The vibrator sat there, unnoticed, until Rarity opened her door, letting Opal outside. As the cat meandered out, she batted at the vibrator, bringing Rarity's attention front and center. Her eyes locked onto the vibrator, and her mouth shot open as she realized the consequences she'd endure if Sweetie Belle had found it instead of Opal. Quickly snatching it up, she brought the toy inside, setting it atop her kitchen table. She turned about and flipped the 'Open" sign to 'Closed', then locked the door, before grabbing the toy and running up to her room. She'd heard of ribbed vibrators before, but had never come across one. Now was her chance, and she was not about to pass it up.

She sat back on her bed, raising the vibrator up above her and focusing on the controls. As she found the correct button, she moved it downward, sliding one side of the egg along her slit, the ridges poking through and teasing her with ecstatic wisps. She writhed in pleasure, her cunt already dripping, as she pressed on the vibrator, easing it inside her, the ridges making her shiver in delight. As the egg made its way into Rarity's lips, she bit her lip, a throaty moan escaping her as she gasped for breath. "I-If this...is how it's making me now..." Rarity pushed down on the egg, forcing it inside her with a blissful sigh. As the vibrator sat within her walls, the juices soaking into it and lubing it up, Rarity reached out to the remote, pressing the button to turn it on.

Rarity was immediately thrown into orgasm, her aching thighs dripping with marecum, her body shivering as the ridged vibrator hummed and moved about inside her. She rode the wave of ecstasy, rising and falling as the egg moved about, its movement erratic and steadily becoming dull. Rarity clicked it up a notch, causing the vibrator to shake her hips as it lodged itself deeper and deeper into her, the pleasure overriding her thought train and blinding her with stars when it sank to the deepest reaches of her pussy. She used her hooves to massage her swollen lips, her clit winking out at her, teasing her with the contact to open air. She eased back, allowing the vibrator to move to the front, its ridges poking out through her lips, the juices leaking down her legs and soaking her sheets. As she reached a plateau of pleasure, she steadied her mind enough to grab hold of the vibrator with her magic, her aura tingling her insides as it worked the vibrator up and out of her.

Panting, Rarity forced the vibrator back in, cranking it to full power and mashing it against her clit. Her vision blanked out to black with prickles of white, her mind overloading from the arousal being elicited from her seeping thighs. The vibrator's ridges slid along her clit, each ridge throwing Rarity into a blinding orgasm, her body writhing in pleasure. As she upped the remote to full, she began to lose track of time as her body vibrated with waves of pleasure, each orgasm taking her higher and higher. She became so lost in the act that she failed to notice the vibrator had shut off. Or that it was floating in a pool of her marecum, the shiny surface reflecting hundreds of tiny Rarity's back at her. Or that it was currently growing a tail and legs and—

"AAH! SPIIIIKE! What have I—oh dear Celestia, we—I can't believe—" Rarity fainted, falling into the puddle of her juices as Spike's head reformed, his eyes still wide as saucers, bugging out at the scene before him. He slowly pushed himself upright, checking his limbs and body to make sure it was all real. He stood, and jumped from her bed, looking back with mouth agape. Rarity lay before him, her body splayed unceremoniously on the sheets, tongue lolling out of her mouth. To the side of the bed, he spied a large box with the same ornate 'R' that adorned the bottles. Smiling to himself, Spike grabbed a few bottles, shoving them into his knapsack.

"Geez. If Rarity wanted it that bad, she could have just asked!" Spike chuckled to himself, before making to leave the Boutique, and head home.

Meanwhile, atop a balcony across town, Twilight Sparkle fought the stains on the wooden floor with naught but a towel and soap. She peeked back into the telescope, seeing Spike leave the Boutique. She smirked, returning to the task of cleaning up her leftovers. She teleported back inside, walking into the bathroom and picking up Spike's body wash bottle. With a dastardly grin, she unscrewed the cap and replaced the body wash with more of Rarity's lotion. She emptied in one bottle, before reaching for a second, dumping its contents into the body wash bottle.

"She likes it rough, but I like it rougher."

Author's Note

I think each of these will be "phrase inspired", this one being "She likes it rough"

Seems to be working out.