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// Weight (fluff with some sort of plot) 
// Story: The Seamstress and The Librarian 
// by Monochromatic 
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Twilight knew that, despite appearances, Rarity was only a pony and was just as victim to insecurities as the rest of Equestria. Though it baffled Twilight that somepony as beautiful, funny, talented, and intelligent as her marefriend would ever feel unworthy of Twilight, it happened sometimes that she’d feel that way.

"Rarity, care to explain what’s going on?" Twilight asked, stepping into the unicorn’s room and finding a large white blanket draped over Rarity’s mirror. She glanced at the curled-up pony on the bed for a moment before making her way towards the mirror and peeking under the drape. It didn’t seem to be broken, and she couldn’t find anything visibly wrong with it.

"Don't take that off!" Rarity’s shrill-voice snapped, watching Twilight all the way from her bed. Once Twilight had let go of the cover, the unicorn placed her head back on the bed and resumed her pouting. "I don't want to look at my hideous body..."

Twilight raised an eyebrow and inspected Rarity with her eyes, trying to find just what was 'hideous' about her while trotting towards the bed. To Twilight, she looked just as perfect and beautiful as always: her silky mane Twilight loved to smell; her soft coat Twilight loved to caress; her eyes that Twilight could get lost in for hours… The only difference between then and always was that Rarity wasn't wearing any makeup. The princess, though, would be quick to insist Rarity looked just as beautiful — if not more — without it.

“Hideous body?” Twilight asked when she reached the bed, hoping for further explanations. “Where?”

Upon noticing Twilight's lack of comprehension to her 'hideousness', Rarity sighed dramatically and placed a hoof over her stomach. "Don't you see?! I've gained so much weight! I look horrid!" She turned to look at Twilight and pointed an accusing hoof at her. "And you look so beautiful, and slim, and the special somepony of a princess should look like a princess herself!" She rested her head on the bed again and closed her eyes. "It’s terrible, just terrible..."

Twilight rolled her eyes at her marefriend's antics. No matter how hard she tried, she failed to see any of the weight Rarity had supposedly gained. Rather than argue from afar, she knew intimacy worked best with the other mare. She climbed on the bed, settling herself next to the needlessly distressed unicorn and nuzzling her lovingly. “Rarity, you're being ridiculous," she whispered, leaving a kiss on the other’s neck and giggling at the fashionista’s attempt to turn a pleased sigh into a frustrated one.

"I am not!” Rarity retorted, her ear flicking involuntarily when Twilight's string of kisses reached it. “I bet everypony thinks I’m not good enough for you! Even I don’t think I’m good enough…”

Twilight leaned back, assessing Rarity's 'pudgy' stomach. She lifted her hoof and brushed it against the unicorn's stomach, feeling Rarity voluntarily suck her tummy in at the touch. Upon closer inspection, Twilight realized that if you looked really closely, the unicorn had indeed seemed to have gained a very slight amount of weight.

Thankfully, Twilight sometimes had no tact whatsoever, saying: "Well, you have a bit of a tummy, but you know..."

"It's dreadful!" Rarity completed theatrically. "I knew it! You think I'm an overweight slob now!"

Twilight giggled and rolled her eyes. "No," she whispered, going back to cuddle her properly and draping her wing over the unicorn, gently tickling said chubby tummy. "I think it's cute, actually."

There was silence for a minute until Rarity turned around to face Twilight. She spoke up again, her voice barely above a whisper: "You really think that?”

Twilight nodded without any hesitation. “And, if anypony ever says you aren’t good enough, I’ll teach them a lesson,” she declared, blushing at Rarity’s half-amused, half-skeptical look. “I mean it, I will!”

It was then that Rarity went quiet, lifting her hoof and tracing circles on the alicorn’s chest. “You’ll fight anyone who think I’m not good enough?” she asked quietly, and before Twilight could answer, she looked at Twilight and continued: “Even if it means fighting me?”

Twilight blinked before allowing her lips to dissolve into a smitten smile. She scooted as close as she could to the unicorn, so much so that their noses brushed together. “Well,” she replied softly, tightening her wing’s grip around Rarity and holding her hoof, “I can think of a really fun and exciting way of ‘fighting’ you…”

“Twilight!”