"Derpy, my dear?"
"Yeah, Docco?" the walleyed mare answered, smiling as her golden eyes drifted apart.
"I need help repairing the TARDIS? Up for the task, love?"
"Anything for you, Doc," Derpy answered quietly. She offered the Doctor her gray hoof, and he took it his brown one. Sometimes she wondered why he chose her. She knew what the other ponies said about her: "Retard," "Derp-eyed," "Stupid," "Dumb," "Cross-eyed," "Weirdo," and "Freak," among other names. But the Doc saw her as perfect. He looked past her bland gray pelt, her stupid bubbly cutie mark, and her stupid, stupid eyes.
That's why she loved him.
XXX
The Doctor walked outside with Derpy's hoof in his. Sometimes he wondered why she chose him. She was so… perfect. She was cute, clumsy, kind beyond words, and so, so, so beautiful. He knew what the other ponies said about him: "Strange," "Magic," "Weird," "Outsider," "Busybody," etc., etc. But Derpy saw him as perfect. She looked past the hours he spent reclused in his lab, his obsession with time travel, and his frequent encounters with dangerous aliens.
That's why he loved her.