Dexter sat in his lab, thinking of his stoopid seester, DeeDee. She was so stooopid. In fact, she didn't even understand that the Aufbau Principle merely stated that electrons in an atom are built up in order of increasing energy states, the stoopid bitch.
And yet, there was something about her obnoxiously large head, freakishly tiny torso, and mile-long legs and arms that aroused Dexter very much. In fact, he truly wanted nothing more than to shove his alpha helix into her beta barrel.
But suddenly, Yugi burst through the door with the sheer power of his huge pointy penor hair. "I challenge you to a children's card game!" he said dramatically, pointing with his finger at Dexter, who was, in fact, working with his chemical in his laboratory, which DeeDee was, in fact, absolutely never allowed inside because she always liked to break everything, which, in fact, made Dexter really upset, because then his experiments were ruined, and he was also worried that DeeDee would, in fact, find his collection dirty pictures and movies of Richard Dawkins.
"Eh, no thanks," said Dexter. "I'm busy contemplating the curious mechanics of a Rule 34-inspired relationship between my sister and I, and how in the world we could make it work considering how our bodies have been drawn."
"Oh yeah," said Courage the Cowardly Dog, who had just stepped into the lab from the plane of eternal candy and rape-bushes. "In fact, your penor boy bits can't be more than an centimeter long or so, huh?"
"CURSE YOU, ANIMATORS!" Dexter raged. "I should have been given a penor as big as Avogadro's Constant!"
And so, Dexter's sick, disgusting fantasy of taking his sister's fecal matter and sprinkling it onto his morning bran flakes was, in fact, never fulfilled.
THE END
P.S. DeeDee, in fact, secretly uses Dexter's test tubes and beakers to stimulate her many engorged prostates. Dexter, in fact, knows this and, in fact, sniffs his equipment regularly.