It was horrible. It was infuriating. It was degrading. Above all, it was humiliating.
In Rarity's own words, Luna thought, this is. The. Worst. Possible. THING.
Twilight's head popped out of the material mountain that had, upon the opening of the closet, decided to appear spontaneously in the bedroom. She blinked blearily, then peered at Luna, eyebrows located somewhere in the room above them. Except that was impossible, because Luna's chambers were at the top of a tower, so actually they were located either on the roof or somewhere in the atmos- DAMMIT LUNA STOP PONDERING YOUR METAPHORS AND SAY SOMETHING
"Um," began Luna – rather eloquently considering her overwhelming terror – "I can explain everything."
Twilight didn't respond. Instead, she pulled an adorable "Best Princess!" sock out of her mouth, and made a show of studying the ten thousand other socks that were currently devouring her, all while Luna watched her with an inescapable feeling of sheer dread.
A minute of terse silence passed as Twilight engaged in a staring contest with a googley-eyed garment, embroidered with the name 'Mr Sock'. Eventually, it was broken: "Can you, Luna? Can you?"
"Yes, actually."
"How-?" Twilight was cut off by a wide-eyed Luna shoving a rather bemused Mr Sock into her face.
"Look at those eyes, Twilight." Twilight went cross-eyed trying to keep up with the wildly googling eyes of Mr Sock. "Look at them and tell them that they will never be worn by a chilly filly on a Winter's evening." Luna shoved them even further, pressing Twilight back into the swarm of saccharine sockiness. "Tell them that they will never be loved."
Luna abruptly pulled her socked hoof back and began stroking it tenderly. Twilight remained cross-eyed for a moment, before shaking it off and glaring at her marefriend. "Luna, they're just out of fashion. I mean," Twilight gestured to the sunlight streaming in through the window. "It's the middle of summer!"
Luna barked out a harsh laugh, and petted Mr Sock even more vigorously. "Hah! That's what they all say, isn't it. 'Oh, it's out of fashion Luna, just throw them away.' To them, I say: Poppycock! Balderdash! A sock is your treasured friend and companion, but come summertime, oh noooo, they're just trash." Luna peered up at Twilight with watering eyes. "Somepony has to give them a home, my love. All I'm doing is collecting them so that they won't feel all alone..." Luna sniffled, cooing softly to a stoney-faced Mr Sock.
A tear shone in the corner of Twilight's eye. "Luna... that was beautiful."
Luna looked up, hope lighting up her face. "R-really?"
"No." Twilight wiped the tear away. "I have sock fibres in my eyes. Now get out while I figure out what to do with these." She held out a hoof. "Give me Mr Sock, and nostocking has to get hurt."
Luna pouted, throwing Mr Sock at her marefriend's face with a "Phooey!" and proceeded to stomp out of the bedroom.
Twilight peeled the googly-eyed sock off of her face. She stared at it. Glancing around, she leaned in closer.
"Finally, my love. We can be together." She whispered tenderly.
Mr Sock sighed with relief. "Oh, how I have waited for this day." He said.
Twilight smiled.