Ok, so I revised this about a million times trying to get the medical terminology just right.
I narrowed it down to just 2 words that are necessary, but readers may not know- coccygeal (kok-sij-ee-uhl) and coccyx (kok-siks). The meaning is explained in the story.
Bedtime Story
Luffy made his way across the floor of their tiny, one-room apartment to the bed. Law had propped himself up with pillows to the headboard of the bed and made himself cozy with a book while waiting for his younger boyfriend to finish his shower and join him. The hot water had felt irresistibly soothing on Luffy's skin in contrast to the cold night air and by the time he had finished his long shower, Law was already dozing.
Luffy toweled off his hair and flopped down next to Law. Law felt the weight of Luffy's body cause his own to shift on the bed and wrench him back to the waking world. The prospective surgeon inhaled sharply as he stretched his weary muscles and his boyfriend lifted the sheet to slip into bed next to him. He wrapped his arm around Luffy's waist as the younger nuzzled up against his tattooed chest. Placing his book on a side table, Law reached up to turn off the light.
"Are you really going to sleep already?" Luffy whined.
"Yeah, I've got another early day tomorrow," Law sighed, "Med school isn't easy, you know." Luffy truly didn't know. He probably knew even less about med school than an ant knew about quantum physics, which is to say he didn't have the slightest idea.
"Well, I'm not sleepy at all." Luffy poked the light back on. "Make out with me."
Law gave him a quick peck on the lips. "There, now let's sleep."
"You're not doing it right," Luffy pouted, wrapping his arms around Law's neck. He stuck out his the tip of his tongue and tried to press it between Law's lips, inadvertently licking his boyfriend's teeth. Law pushed him back by the shoulders and held him at arm's length but Luffy stuck his tongue out farther, waggling it around in an attempt to reach Law.
"You're the one who's not doing it right," Law corrected, taking a hand off of one of Luffy's shoulders to wipe the spit from his lips.
"Come on~" Luffy whined.
"I'm beyond exhausted right now."
"Sing me a song. Sing me 'Dr. Heart Stealer'!"
"Not right now." Law tried on his best grumpy frown.
Luffy collapsed on top of Law, letting out a groan for as long as his lungs would let him.
"Well, I guess I could read you a bedtime story," Law offered, "but the only books I have are my textbooks, and those just wouldn't be any fun for you."
"That's okay," Luffy smiled widely. He grabbed the one off of the nightstand and handed it to Law.
Law flipped quickly through the book, trying to find the most boring page. Luffy eagerly wormed his way under the arm holding the book and pressed his body close so that he could see the illustrations of the skeletal system. Law cleared his throat and began to read.
"This small bone found at the base of the spine resembles an abbreviated version of a tail. It may consist of up to five coccygeal vertebrae which are fused to create a single bone. It is known as the coccyx."
Luffy giggled.
"What?" Law paused to look at him before continuing, "The coccyx-"
Luffy burst out laughing.
Law gave him a puzzled look. "What's so funny?"
"Cock-" Luffy gasped for breath. "Six. You said 'cock six'. You-" At that point Luffy had begun distorting his speech with laughter but Law caught the words "tail" and "cock" several times.
"Coccyx," Law mulled the word over trying to imagine what was so funny.
The younger doubled over, more laughter bursting out of him at hearing the word again. Knowing him, Law figured that Luffy must have been having some seriously strange mental images to sustain his laughing fit.
"Coccyx is the name for your tail bone and I'm about to kick yours if you don't let me get some sleep," Law warned him playfully as he closed the book. He gently knocked Luffy on the head with it before setting it back on the nightstand by the bed and shutting off the light.
He could tell Luffy was tired too. He often laughed at the most absurdly mundane things when he was.
Luffy took several deep breaths, attempting to quell his humor. He settled into Law's embrace in the darkness, his body still shaking with nearly silent giggles as he whispered "cock six", thinking of whatever mental images were keeping him amused.
